The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/compat/ndis/subr_ndis.c

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    1 /*-
    2  * Copyright (c) 2003
    3  *      Bill Paul <wpaul@windriver.com>.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by Bill Paul.
   16  * 4. Neither the name of the author nor the names of any co-contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
   24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   30  * THE POSSIBILITY OF SUCH DAMAGE.
   31  */
   32 
   33 #include <sys/cdefs.h>
   34 __FBSDID("$FreeBSD: releng/8.0/sys/compat/ndis/subr_ndis.c 194677 2009-06-23 02:19:59Z thompsa $");
   35 
   36 /*
   37  * This file implements a translation layer between the BSD networking
   38  * infrasturcture and Windows(R) NDIS network driver modules. A Windows
   39  * NDIS driver calls into several functions in the NDIS.SYS Windows
   40  * kernel module and exports a table of functions designed to be called
   41  * by the NDIS subsystem. Using the PE loader, we can patch our own
   42  * versions of the NDIS routines into a given Windows driver module and
   43  * convince the driver that it is in fact running on Windows.
   44  *
   45  * We provide a table of all our implemented NDIS routines which is patched
   46  * into the driver object code. All our exported routines must use the
   47  * _stdcall calling convention, since that's what the Windows object code
   48  * expects.
   49  */
   50 
   51 
   52 #include <sys/ctype.h>
   53 #include <sys/param.h>
   54 #include <sys/types.h>
   55 #include <sys/errno.h>
   56 
   57 #include <sys/callout.h>
   58 #include <sys/kernel.h>
   59 #include <sys/systm.h>
   60 #include <sys/malloc.h>
   61 #include <sys/lock.h>
   62 #include <sys/mutex.h>
   63 #include <sys/socket.h>
   64 #include <sys/sysctl.h>
   65 #include <sys/timespec.h>
   66 #include <sys/smp.h>
   67 #include <sys/queue.h>
   68 #include <sys/proc.h>
   69 #include <sys/filedesc.h>
   70 #include <sys/namei.h>
   71 #include <sys/fcntl.h>
   72 #include <sys/vnode.h>
   73 #include <sys/kthread.h>
   74 #include <sys/linker.h>
   75 #include <sys/mount.h>
   76 #include <sys/sysproto.h>
   77 
   78 #include <net/if.h>
   79 #include <net/if_arp.h>
   80 #include <net/ethernet.h>
   81 #include <net/if_dl.h>
   82 #include <net/if_media.h>
   83 
   84 #include <machine/atomic.h>
   85 #include <machine/bus.h>
   86 #include <machine/resource.h>
   87 
   88 #include <sys/bus.h>
   89 #include <sys/rman.h>
   90 
   91 #include <machine/stdarg.h>
   92 
   93 #include <net80211/ieee80211_var.h>
   94 #include <net80211/ieee80211_ioctl.h>
   95 
   96 #include <dev/pci/pcireg.h>
   97 #include <dev/pci/pcivar.h>
   98 #include <dev/usb/usb.h>
   99 #include <dev/usb/usbdi.h>
  100 
  101 #include <compat/ndis/pe_var.h>
  102 #include <compat/ndis/cfg_var.h>
  103 #include <compat/ndis/resource_var.h>
  104 #include <compat/ndis/ntoskrnl_var.h>
  105 #include <compat/ndis/hal_var.h>
  106 #include <compat/ndis/ndis_var.h>
  107 #include <dev/if_ndis/if_ndisvar.h>
  108 
  109 #include <vm/vm.h>
  110 #include <vm/vm_param.h>
  111 #include <vm/pmap.h>
  112 #include <vm/uma.h>
  113 #include <vm/vm_kern.h>
  114 #include <vm/vm_map.h>
  115 
  116 static char ndis_filepath[MAXPATHLEN];
  117 
  118 SYSCTL_STRING(_hw, OID_AUTO, ndis_filepath, CTLFLAG_RW, ndis_filepath,
  119     MAXPATHLEN, "Path used by NdisOpenFile() to search for files");
  120 
  121 static void NdisInitializeWrapper(ndis_handle *,
  122         driver_object *, void *, void *);
  123 static ndis_status NdisMRegisterMiniport(ndis_handle,
  124         ndis_miniport_characteristics *, int);
  125 static ndis_status NdisAllocateMemoryWithTag(void **,
  126         uint32_t, uint32_t);
  127 static ndis_status NdisAllocateMemory(void **,
  128         uint32_t, uint32_t, ndis_physaddr);
  129 static void NdisFreeMemory(void *, uint32_t, uint32_t);
  130 static ndis_status NdisMSetAttributesEx(ndis_handle, ndis_handle,
  131         uint32_t, uint32_t, ndis_interface_type);
  132 static void NdisOpenConfiguration(ndis_status *,
  133         ndis_handle *, ndis_handle);
  134 static void NdisOpenConfigurationKeyByIndex(ndis_status *,
  135         ndis_handle, uint32_t, unicode_string *, ndis_handle *);
  136 static void NdisOpenConfigurationKeyByName(ndis_status *,
  137         ndis_handle, unicode_string *, ndis_handle *);
  138 static ndis_status ndis_encode_parm(ndis_miniport_block *,
  139         struct sysctl_oid *, ndis_parm_type, ndis_config_parm **);
  140 static ndis_status ndis_decode_parm(ndis_miniport_block *,
  141         ndis_config_parm *, char *);
  142 static void NdisReadConfiguration(ndis_status *, ndis_config_parm **,
  143         ndis_handle, unicode_string *, ndis_parm_type);
  144 static void NdisWriteConfiguration(ndis_status *, ndis_handle,
  145         unicode_string *, ndis_config_parm *);
  146 static void NdisCloseConfiguration(ndis_handle);
  147 static void NdisAllocateSpinLock(ndis_spin_lock *);
  148 static void NdisFreeSpinLock(ndis_spin_lock *);
  149 static void NdisAcquireSpinLock(ndis_spin_lock *);
  150 static void NdisReleaseSpinLock(ndis_spin_lock *);
  151 static void NdisDprAcquireSpinLock(ndis_spin_lock *);
  152 static void NdisDprReleaseSpinLock(ndis_spin_lock *);
  153 static void NdisInitializeReadWriteLock(ndis_rw_lock *);
  154 static void NdisAcquireReadWriteLock(ndis_rw_lock *,
  155         uint8_t, ndis_lock_state *);
  156 static void NdisReleaseReadWriteLock(ndis_rw_lock *, ndis_lock_state *);
  157 static uint32_t NdisReadPciSlotInformation(ndis_handle, uint32_t,
  158         uint32_t, void *, uint32_t);
  159 static uint32_t NdisWritePciSlotInformation(ndis_handle, uint32_t,
  160         uint32_t, void *, uint32_t);
  161 static void NdisWriteErrorLogEntry(ndis_handle, ndis_error_code, uint32_t, ...);
  162 static void ndis_map_cb(void *, bus_dma_segment_t *, int, int);
  163 static void NdisMStartBufferPhysicalMapping(ndis_handle,
  164         ndis_buffer *, uint32_t, uint8_t, ndis_paddr_unit *, uint32_t *);
  165 static void NdisMCompleteBufferPhysicalMapping(ndis_handle,
  166         ndis_buffer *, uint32_t);
  167 static void NdisMInitializeTimer(ndis_miniport_timer *, ndis_handle,
  168         ndis_timer_function, void *);
  169 static void NdisInitializeTimer(ndis_timer *,
  170         ndis_timer_function, void *);
  171 static void NdisSetTimer(ndis_timer *, uint32_t);
  172 static void NdisMSetPeriodicTimer(ndis_miniport_timer *, uint32_t);
  173 static void NdisMCancelTimer(ndis_timer *, uint8_t *);
  174 static void ndis_timercall(kdpc *, ndis_miniport_timer *,
  175         void *, void *);
  176 static void NdisMQueryAdapterResources(ndis_status *, ndis_handle,
  177         ndis_resource_list *, uint32_t *);
  178 static ndis_status NdisMRegisterIoPortRange(void **,
  179         ndis_handle, uint32_t, uint32_t);
  180 static void NdisMDeregisterIoPortRange(ndis_handle,
  181         uint32_t, uint32_t, void *);
  182 static void NdisReadNetworkAddress(ndis_status *, void **,
  183         uint32_t *, ndis_handle);
  184 static ndis_status NdisQueryMapRegisterCount(uint32_t, uint32_t *);
  185 static ndis_status NdisMAllocateMapRegisters(ndis_handle,
  186         uint32_t, uint8_t, uint32_t, uint32_t);
  187 static void NdisMFreeMapRegisters(ndis_handle);
  188 static void ndis_mapshared_cb(void *, bus_dma_segment_t *, int, int);
  189 static void NdisMAllocateSharedMemory(ndis_handle, uint32_t,
  190         uint8_t, void **, ndis_physaddr *);
  191 static void ndis_asyncmem_complete(device_object *, void *);
  192 static ndis_status NdisMAllocateSharedMemoryAsync(ndis_handle,
  193         uint32_t, uint8_t, void *);
  194 static void NdisMFreeSharedMemory(ndis_handle, uint32_t,
  195         uint8_t, void *, ndis_physaddr);
  196 static ndis_status NdisMMapIoSpace(void **, ndis_handle,
  197         ndis_physaddr, uint32_t);
  198 static void NdisMUnmapIoSpace(ndis_handle, void *, uint32_t);
  199 static uint32_t NdisGetCacheFillSize(void);
  200 static uint32_t NdisMGetDmaAlignment(ndis_handle);
  201 static ndis_status NdisMInitializeScatterGatherDma(ndis_handle,
  202         uint8_t, uint32_t);
  203 static void NdisUnchainBufferAtFront(ndis_packet *, ndis_buffer **);
  204 static void NdisUnchainBufferAtBack(ndis_packet *, ndis_buffer **);
  205 static void NdisAllocateBufferPool(ndis_status *,
  206         ndis_handle *, uint32_t);
  207 static void NdisFreeBufferPool(ndis_handle);
  208 static void NdisAllocateBuffer(ndis_status *, ndis_buffer **,
  209         ndis_handle, void *, uint32_t);
  210 static void NdisFreeBuffer(ndis_buffer *);
  211 static uint32_t NdisBufferLength(ndis_buffer *);
  212 static void NdisQueryBuffer(ndis_buffer *, void **, uint32_t *);
  213 static void NdisQueryBufferSafe(ndis_buffer *, void **,
  214         uint32_t *, uint32_t);
  215 static void *NdisBufferVirtualAddress(ndis_buffer *);
  216 static void *NdisBufferVirtualAddressSafe(ndis_buffer *, uint32_t);
  217 static void NdisAdjustBufferLength(ndis_buffer *, int);
  218 static uint32_t NdisInterlockedIncrement(uint32_t *);
  219 static uint32_t NdisInterlockedDecrement(uint32_t *);
  220 static void NdisInitializeEvent(ndis_event *);
  221 static void NdisSetEvent(ndis_event *);
  222 static void NdisResetEvent(ndis_event *);
  223 static uint8_t NdisWaitEvent(ndis_event *, uint32_t);
  224 static ndis_status NdisUnicodeStringToAnsiString(ansi_string *,
  225         unicode_string *);
  226 static ndis_status
  227         NdisAnsiStringToUnicodeString(unicode_string *, ansi_string *);
  228 static ndis_status NdisMPciAssignResources(ndis_handle,
  229         uint32_t, ndis_resource_list **);
  230 static ndis_status NdisMRegisterInterrupt(ndis_miniport_interrupt *,
  231         ndis_handle, uint32_t, uint32_t, uint8_t,
  232         uint8_t, ndis_interrupt_mode);
  233 static void NdisMDeregisterInterrupt(ndis_miniport_interrupt *);
  234 static void NdisMRegisterAdapterShutdownHandler(ndis_handle, void *,
  235         ndis_shutdown_handler);
  236 static void NdisMDeregisterAdapterShutdownHandler(ndis_handle);
  237 static uint32_t NDIS_BUFFER_TO_SPAN_PAGES(ndis_buffer *);
  238 static void NdisGetBufferPhysicalArraySize(ndis_buffer *,
  239         uint32_t *);
  240 static void NdisQueryBufferOffset(ndis_buffer *,
  241         uint32_t *, uint32_t *);
  242 static uint32_t NdisReadPcmciaAttributeMemory(ndis_handle,
  243         uint32_t, void *, uint32_t);
  244 static uint32_t NdisWritePcmciaAttributeMemory(ndis_handle,
  245         uint32_t, void *, uint32_t);
  246 static list_entry *NdisInterlockedInsertHeadList(list_entry *,
  247         list_entry *, ndis_spin_lock *);
  248 static list_entry *NdisInterlockedRemoveHeadList(list_entry *,
  249         ndis_spin_lock *);
  250 static list_entry *NdisInterlockedInsertTailList(list_entry *,
  251         list_entry *, ndis_spin_lock *);
  252 static uint8_t
  253         NdisMSynchronizeWithInterrupt(ndis_miniport_interrupt *,
  254         void *, void *);
  255 static void NdisGetCurrentSystemTime(uint64_t *);
  256 static void NdisGetSystemUpTime(uint32_t *);
  257 static void NdisInitializeString(unicode_string *, char *);
  258 static void NdisInitAnsiString(ansi_string *, char *);
  259 static void NdisInitUnicodeString(unicode_string *, uint16_t *);
  260 static void NdisFreeString(unicode_string *);
  261 static ndis_status NdisMRemoveMiniport(ndis_handle *);
  262 static void NdisTerminateWrapper(ndis_handle, void *);
  263 static void NdisMGetDeviceProperty(ndis_handle, device_object **,
  264         device_object **, device_object **, cm_resource_list *,
  265         cm_resource_list *);
  266 static void NdisGetFirstBufferFromPacket(ndis_packet *,
  267         ndis_buffer **, void **, uint32_t *, uint32_t *);
  268 static void NdisGetFirstBufferFromPacketSafe(ndis_packet *,
  269         ndis_buffer **, void **, uint32_t *, uint32_t *, uint32_t);
  270 static int ndis_find_sym(linker_file_t, char *, char *, caddr_t *);
  271 static void NdisOpenFile(ndis_status *, ndis_handle *, uint32_t *,
  272         unicode_string *, ndis_physaddr);
  273 static void NdisMapFile(ndis_status *, void **, ndis_handle);
  274 static void NdisUnmapFile(ndis_handle);
  275 static void NdisCloseFile(ndis_handle);
  276 static uint8_t NdisSystemProcessorCount(void);
  277 static void NdisMIndicateStatusComplete(ndis_handle);
  278 static void NdisMIndicateStatus(ndis_handle, ndis_status,
  279     void *, uint32_t);
  280 static uint8_t ndis_intr(kinterrupt *, void *);
  281 static void ndis_intrhand(kdpc *, ndis_miniport_interrupt *, void *, void *);
  282 static funcptr ndis_findwrap(funcptr);
  283 static void NdisCopyFromPacketToPacket(ndis_packet *,
  284         uint32_t, uint32_t, ndis_packet *, uint32_t, uint32_t *);
  285 static void NdisCopyFromPacketToPacketSafe(ndis_packet *,
  286         uint32_t, uint32_t, ndis_packet *, uint32_t, uint32_t *, uint32_t);
  287 static void NdisIMCopySendPerPacketInfo(ndis_packet *, ndis_packet *);
  288 static ndis_status NdisMRegisterDevice(ndis_handle,
  289         unicode_string *, unicode_string *, driver_dispatch **,
  290         void **, ndis_handle *);
  291 static ndis_status NdisMDeregisterDevice(ndis_handle);
  292 static ndis_status
  293         NdisMQueryAdapterInstanceName(unicode_string *, ndis_handle);
  294 static void NdisMRegisterUnloadHandler(ndis_handle, void *);
  295 static void dummy(void);
  296 
  297 /*
  298  * Some really old drivers do not properly check the return value
  299  * from NdisAllocatePacket() and NdisAllocateBuffer() and will
  300  * sometimes allocate few more buffers/packets that they originally
  301  * requested when they created the pool. To prevent this from being
  302  * a problem, we allocate a few extra buffers/packets beyond what
  303  * the driver asks for. This #define controls how many.
  304  */
  305 #define NDIS_POOL_EXTRA         16
  306 
  307 int
  308 ndis_libinit()
  309 {
  310         image_patch_table       *patch;
  311 
  312         strcpy(ndis_filepath, "/compat/ndis");
  313 
  314         patch = ndis_functbl;
  315         while (patch->ipt_func != NULL) {
  316                 windrv_wrap((funcptr)patch->ipt_func,
  317                     (funcptr *)&patch->ipt_wrap,
  318                     patch->ipt_argcnt, patch->ipt_ftype);
  319                 patch++;
  320         }
  321 
  322         return(0);
  323 }
  324 
  325 int
  326 ndis_libfini()
  327 {
  328         image_patch_table       *patch;
  329 
  330         patch = ndis_functbl;
  331         while (patch->ipt_func != NULL) {
  332                 windrv_unwrap(patch->ipt_wrap);
  333                 patch++;
  334         }
  335 
  336         return(0);
  337 }
  338 
  339 static funcptr
  340 ndis_findwrap(func)
  341         funcptr                 func;
  342 {
  343         image_patch_table       *patch;
  344 
  345         patch = ndis_functbl;
  346         while (patch->ipt_func != NULL) {
  347                 if ((funcptr)patch->ipt_func == func)
  348                         return((funcptr)patch->ipt_wrap);
  349                 patch++;
  350         }
  351 
  352         return(NULL);
  353 }
  354 
  355 /*
  356  * This routine does the messy Windows Driver Model device attachment
  357  * stuff on behalf of NDIS drivers. We register our own AddDevice
  358  * routine here
  359  */
  360 static void
  361 NdisInitializeWrapper(wrapper, drv, path, unused)
  362         ndis_handle             *wrapper;
  363         driver_object           *drv;
  364         void                    *path;
  365         void                    *unused;
  366 {
  367         /*
  368          * As of yet, I haven't come up with a compelling
  369          * reason to define a private NDIS wrapper structure,
  370          * so we use a pointer to the driver object as the
  371          * wrapper handle. The driver object has the miniport
  372          * characteristics struct for this driver hung off it
  373          * via IoAllocateDriverObjectExtension(), and that's
  374          * really all the private data we need.
  375          */
  376 
  377         *wrapper = drv;
  378 
  379         /*
  380          * If this was really Windows, we'd be registering dispatch
  381          * routines for the NDIS miniport module here, but we're
  382          * not Windows so all we really need to do is set up an
  383          * AddDevice function that'll be invoked when a new device
  384          * instance appears.
  385          */
  386 
  387         drv->dro_driverext->dre_adddevicefunc = NdisAddDevice;
  388 
  389         return;
  390 }
  391 
  392 static void
  393 NdisTerminateWrapper(handle, syspec)
  394         ndis_handle             handle;
  395         void                    *syspec;
  396 {
  397         /* Nothing to see here, move along. */
  398         return;
  399 }
  400 
  401 static ndis_status
  402 NdisMRegisterMiniport(handle, characteristics, len)
  403         ndis_handle             handle;
  404         ndis_miniport_characteristics *characteristics;
  405         int                     len;
  406 {
  407         ndis_miniport_characteristics   *ch = NULL;
  408         driver_object           *drv;
  409 
  410         drv = (driver_object *)handle;
  411 
  412         /*
  413          * We need to save the NDIS miniport characteristics
  414          * somewhere. This data is per-driver, not per-device
  415          * (all devices handled by the same driver have the
  416          * same characteristics) so we hook it onto the driver
  417          * object using IoAllocateDriverObjectExtension().
  418          * The extra extension info is automagically deleted when
  419          * the driver is unloaded (see windrv_unload()).
  420          */
  421 
  422         if (IoAllocateDriverObjectExtension(drv, (void *)1,
  423             sizeof(ndis_miniport_characteristics), (void **)&ch) !=
  424             STATUS_SUCCESS) {
  425                 return(NDIS_STATUS_RESOURCES);
  426         }
  427 
  428         bzero((char *)ch, sizeof(ndis_miniport_characteristics));
  429 
  430         bcopy((char *)characteristics, (char *)ch, len);
  431 
  432         if (ch->nmc_version_major < 5 || ch->nmc_version_minor < 1) {
  433                 ch->nmc_shutdown_handler = NULL;
  434                 ch->nmc_canceltxpkts_handler = NULL;
  435                 ch->nmc_pnpevent_handler = NULL;
  436         }
  437 
  438         return(NDIS_STATUS_SUCCESS);
  439 }
  440 
  441 static ndis_status
  442 NdisAllocateMemoryWithTag(vaddr, len, tag)
  443         void                    **vaddr;
  444         uint32_t                len;
  445         uint32_t                tag;
  446 {
  447         void                    *mem;
  448 
  449         mem = ExAllocatePoolWithTag(NonPagedPool, len, tag);
  450         if (mem == NULL) {
  451                 return(NDIS_STATUS_RESOURCES);
  452         }
  453         *vaddr = mem;
  454 
  455         return(NDIS_STATUS_SUCCESS);
  456 }
  457 
  458 static ndis_status
  459 NdisAllocateMemory(vaddr, len, flags, highaddr)
  460         void                    **vaddr;
  461         uint32_t                len;
  462         uint32_t                flags;
  463         ndis_physaddr           highaddr;
  464 {
  465         void                    *mem;
  466 
  467         mem = ExAllocatePoolWithTag(NonPagedPool, len, 0);
  468         if (mem == NULL)
  469                 return(NDIS_STATUS_RESOURCES);
  470         *vaddr = mem;
  471 
  472         return(NDIS_STATUS_SUCCESS);
  473 }
  474 
  475 static void
  476 NdisFreeMemory(vaddr, len, flags)
  477         void                    *vaddr;
  478         uint32_t                len;
  479         uint32_t                flags;
  480 {
  481         if (len == 0)
  482                 return;
  483 
  484         ExFreePool(vaddr);
  485 
  486         return;
  487 }
  488 
  489 static ndis_status
  490 NdisMSetAttributesEx(adapter_handle, adapter_ctx, hangsecs,
  491                         flags, iftype)
  492         ndis_handle                     adapter_handle;
  493         ndis_handle                     adapter_ctx;
  494         uint32_t                        hangsecs;
  495         uint32_t                        flags;
  496         ndis_interface_type             iftype;
  497 {
  498         ndis_miniport_block             *block;
  499 
  500         /*
  501          * Save the adapter context, we need it for calling
  502          * the driver's internal functions.
  503          */
  504         block = (ndis_miniport_block *)adapter_handle;
  505         block->nmb_miniportadapterctx = adapter_ctx;
  506         block->nmb_checkforhangsecs = hangsecs;
  507         block->nmb_flags = flags;
  508 
  509         return(NDIS_STATUS_SUCCESS);
  510 }
  511 
  512 static void
  513 NdisOpenConfiguration(status, cfg, wrapctx)
  514         ndis_status             *status;
  515         ndis_handle             *cfg;
  516         ndis_handle             wrapctx;
  517 {
  518         *cfg = wrapctx;
  519         *status = NDIS_STATUS_SUCCESS;
  520 
  521         return;
  522 }
  523 
  524 static void
  525 NdisOpenConfigurationKeyByName(status, cfg, subkey, subhandle)
  526         ndis_status             *status;
  527         ndis_handle             cfg;
  528         unicode_string          *subkey;
  529         ndis_handle             *subhandle;
  530 {
  531         *subhandle = cfg;
  532         *status = NDIS_STATUS_SUCCESS;
  533 
  534         return;
  535 }
  536 
  537 static void
  538 NdisOpenConfigurationKeyByIndex(status, cfg, idx, subkey, subhandle)
  539         ndis_status             *status;
  540         ndis_handle             cfg;
  541         uint32_t                idx;
  542         unicode_string          *subkey;
  543         ndis_handle             *subhandle;
  544 {
  545         *status = NDIS_STATUS_FAILURE;
  546 
  547         return;
  548 }
  549 
  550 static ndis_status
  551 ndis_encode_parm(block, oid, type, parm)
  552         ndis_miniport_block     *block;
  553         struct sysctl_oid       *oid;
  554         ndis_parm_type          type;
  555         ndis_config_parm        **parm;
  556 {
  557         ndis_config_parm        *p;
  558         ndis_parmlist_entry     *np;
  559         unicode_string          *us;
  560         ansi_string             as;
  561         int                     base = 0;
  562         uint32_t                val;
  563         char                    tmp[32];
  564 
  565         np = ExAllocatePoolWithTag(NonPagedPool,
  566             sizeof(ndis_parmlist_entry), 0);
  567         if (np == NULL)
  568                 return(NDIS_STATUS_RESOURCES);
  569         InsertHeadList((&block->nmb_parmlist), (&np->np_list));
  570         *parm = p = &np->np_parm;
  571 
  572         switch(type) {
  573         case ndis_parm_string:
  574                 /* See if this might be a number. */
  575                 val = strtoul((char *)oid->oid_arg1, NULL, 10);
  576                 us = &p->ncp_parmdata.ncp_stringdata;
  577                 p->ncp_type = ndis_parm_string;
  578                 if (val) {
  579                         snprintf(tmp, 32, "%x", val);
  580                         RtlInitAnsiString(&as, tmp);
  581                 } else {
  582                         RtlInitAnsiString(&as, (char *)oid->oid_arg1);
  583                 }
  584 
  585                 if (RtlAnsiStringToUnicodeString(us, &as, TRUE)) {
  586                         ExFreePool(np);
  587                         return(NDIS_STATUS_RESOURCES);
  588                 }
  589                 break;
  590         case ndis_parm_int:
  591                 if (strncmp((char *)oid->oid_arg1, "0x", 2) == 0)
  592                         base = 16;
  593                 else
  594                         base = 10;
  595                 p->ncp_type = ndis_parm_int;
  596                 p->ncp_parmdata.ncp_intdata =
  597                     strtol((char *)oid->oid_arg1, NULL, base);
  598                 break;
  599         case ndis_parm_hexint:
  600 #ifdef notdef
  601                 if (strncmp((char *)oid->oid_arg1, "0x", 2) == 0)
  602                         base = 16;
  603                 else
  604                         base = 10;
  605 #endif
  606                 base = 16;
  607                 p->ncp_type = ndis_parm_hexint;
  608                 p->ncp_parmdata.ncp_intdata =
  609                     strtoul((char *)oid->oid_arg1, NULL, base);
  610                 break;
  611         default:
  612                 return(NDIS_STATUS_FAILURE);
  613                 break;
  614         }
  615 
  616         return(NDIS_STATUS_SUCCESS);
  617 }
  618 
  619 static void
  620 NdisReadConfiguration(status, parm, cfg, key, type)
  621         ndis_status             *status;
  622         ndis_config_parm        **parm;
  623         ndis_handle             cfg;
  624         unicode_string          *key;
  625         ndis_parm_type          type;
  626 {
  627         char                    *keystr = NULL;
  628         ndis_miniport_block     *block;
  629         struct ndis_softc       *sc;
  630         struct sysctl_oid       *oidp;
  631         struct sysctl_ctx_entry *e;
  632         ansi_string             as;
  633 
  634         block = (ndis_miniport_block *)cfg;
  635         sc = device_get_softc(block->nmb_physdeviceobj->do_devext);
  636 
  637         if (key->us_len == 0 || key->us_buf == NULL) {
  638                 *status = NDIS_STATUS_FAILURE;
  639                 return;
  640         }
  641 
  642         if (RtlUnicodeStringToAnsiString(&as, key, TRUE)) {
  643                 *status = NDIS_STATUS_RESOURCES;
  644                 return;
  645         }
  646 
  647         keystr = as.as_buf;
  648 
  649         /*
  650          * See if registry key is already in a list of known keys
  651          * included with the driver.
  652          */
  653 #if __FreeBSD_version < 502113
  654         TAILQ_FOREACH(e, &sc->ndis_ctx, link) {
  655 #else
  656         TAILQ_FOREACH(e, device_get_sysctl_ctx(sc->ndis_dev), link) {
  657 #endif
  658                 oidp = e->entry;
  659                 if (strcasecmp(oidp->oid_name, keystr) == 0) {
  660                         if (strcmp((char *)oidp->oid_arg1, "UNSET") == 0) {
  661                                 RtlFreeAnsiString(&as);
  662                                 *status = NDIS_STATUS_FAILURE;
  663                                 return;
  664                         }
  665 
  666                         *status = ndis_encode_parm(block, oidp, type, parm);
  667                         RtlFreeAnsiString(&as);
  668                         return;
  669                 }
  670         }
  671 
  672         /*
  673          * If the key didn't match, add it to the list of dynamically
  674          * created ones. Sometimes, drivers refer to registry keys
  675          * that aren't documented in their .INF files. These keys
  676          * are supposed to be created by some sort of utility or
  677          * control panel snap-in that comes with the driver software.
  678          * Sometimes it's useful to be able to manipulate these.
  679          * If the driver requests the key in the form of a string,
  680          * make its default value an empty string, otherwise default
  681          * it to "".
  682          */
  683 
  684         if (type == ndis_parm_int || type == ndis_parm_hexint)
  685                 ndis_add_sysctl(sc, keystr, "(dynamic integer key)",
  686                     "UNSET", CTLFLAG_RW);
  687         else
  688                 ndis_add_sysctl(sc, keystr, "(dynamic string key)",
  689                     "UNSET", CTLFLAG_RW);
  690 
  691         RtlFreeAnsiString(&as);
  692         *status = NDIS_STATUS_FAILURE;
  693 
  694         return;
  695 }
  696 
  697 static ndis_status
  698 ndis_decode_parm(block, parm, val)
  699         ndis_miniport_block     *block;
  700         ndis_config_parm        *parm;
  701         char                    *val;
  702 {
  703         unicode_string          *ustr;
  704         ansi_string             as;
  705 
  706         switch(parm->ncp_type) {
  707         case ndis_parm_string:
  708                 ustr = &parm->ncp_parmdata.ncp_stringdata;
  709                 if (RtlUnicodeStringToAnsiString(&as, ustr, TRUE))
  710                         return(NDIS_STATUS_RESOURCES);
  711                 bcopy(as.as_buf, val, as.as_len);
  712                 RtlFreeAnsiString(&as);
  713                 break;
  714         case ndis_parm_int:
  715                 sprintf(val, "%d", parm->ncp_parmdata.ncp_intdata);
  716                 break;
  717         case ndis_parm_hexint:
  718                 sprintf(val, "%xu", parm->ncp_parmdata.ncp_intdata);
  719                 break;
  720         default:
  721                 return(NDIS_STATUS_FAILURE);
  722                 break;
  723         }
  724         return(NDIS_STATUS_SUCCESS);
  725 }
  726 
  727 static void
  728 NdisWriteConfiguration(status, cfg, key, parm)
  729         ndis_status             *status;
  730         ndis_handle             cfg;
  731         unicode_string          *key;
  732         ndis_config_parm        *parm;
  733 {
  734         ansi_string             as;
  735         char                    *keystr = NULL;
  736         ndis_miniport_block     *block;
  737         struct ndis_softc       *sc;
  738         struct sysctl_oid       *oidp;
  739         struct sysctl_ctx_entry *e;
  740         char                    val[256];
  741 
  742         block = (ndis_miniport_block *)cfg;
  743         sc = device_get_softc(block->nmb_physdeviceobj->do_devext);
  744 
  745         if (RtlUnicodeStringToAnsiString(&as, key, TRUE)) {
  746                 *status = NDIS_STATUS_RESOURCES;
  747                 return;
  748         }
  749 
  750         keystr = as.as_buf;
  751 
  752         /* Decode the parameter into a string. */
  753         bzero(val, sizeof(val));
  754         *status = ndis_decode_parm(block, parm, val);
  755         if (*status != NDIS_STATUS_SUCCESS) {
  756                 RtlFreeAnsiString(&as);
  757                 return;
  758         }
  759 
  760         /* See if the key already exists. */
  761 
  762 #if __FreeBSD_version < 502113
  763         TAILQ_FOREACH(e, &sc->ndis_ctx, link) {
  764 #else
  765         TAILQ_FOREACH(e, device_get_sysctl_ctx(sc->ndis_dev), link) {
  766 #endif
  767                 oidp = e->entry;
  768                 if (strcasecmp(oidp->oid_name, keystr) == 0) {
  769                         /* Found it, set the value. */
  770                         strcpy((char *)oidp->oid_arg1, val);
  771                         RtlFreeAnsiString(&as);
  772                         return;
  773                 }
  774         }
  775 
  776         /* Not found, add a new key with the specified value. */
  777         ndis_add_sysctl(sc, keystr, "(dynamically set key)",
  778                     val, CTLFLAG_RW);
  779 
  780         RtlFreeAnsiString(&as);
  781         *status = NDIS_STATUS_SUCCESS;
  782         return;
  783 }
  784 
  785 static void
  786 NdisCloseConfiguration(cfg)
  787         ndis_handle             cfg;
  788 {
  789         list_entry              *e;
  790         ndis_parmlist_entry     *pe;
  791         ndis_miniport_block     *block;
  792         ndis_config_parm        *p;
  793 
  794         block = (ndis_miniport_block *)cfg;
  795 
  796         while (!IsListEmpty(&block->nmb_parmlist)) {
  797                 e = RemoveHeadList(&block->nmb_parmlist);
  798                 pe = CONTAINING_RECORD(e, ndis_parmlist_entry, np_list);
  799                 p = &pe->np_parm;
  800                 if (p->ncp_type == ndis_parm_string)
  801                         RtlFreeUnicodeString(&p->ncp_parmdata.ncp_stringdata);
  802                 ExFreePool(e);
  803         }
  804 
  805         return;
  806 }
  807 
  808 /*
  809  * Initialize a Windows spinlock.
  810  */
  811 static void
  812 NdisAllocateSpinLock(lock)
  813         ndis_spin_lock          *lock;
  814 {
  815         KeInitializeSpinLock(&lock->nsl_spinlock);
  816         lock->nsl_kirql = 0;
  817 
  818         return;
  819 }
  820 
  821 /*
  822  * Destroy a Windows spinlock. This is a no-op for now. There are two reasons
  823  * for this. One is that it's sort of superfluous: we don't have to do anything
  824  * special to deallocate the spinlock. The other is that there are some buggy
  825  * drivers which call NdisFreeSpinLock() _after_ calling NdisFreeMemory() on
  826  * the block of memory in which the spinlock resides. (Yes, ADMtek, I'm
  827  * talking to you.)
  828  */
  829 static void
  830 NdisFreeSpinLock(lock)
  831         ndis_spin_lock          *lock;
  832 {
  833 #ifdef notdef
  834         KeInitializeSpinLock(&lock->nsl_spinlock);
  835         lock->nsl_kirql = 0;
  836 #endif
  837         return;
  838 }
  839 
  840 /*
  841  * Acquire a spinlock from IRQL <= DISPATCH_LEVEL.
  842  */
  843 
  844 static void
  845 NdisAcquireSpinLock(lock)
  846         ndis_spin_lock          *lock;
  847 {
  848         KeAcquireSpinLock(&lock->nsl_spinlock, &lock->nsl_kirql);
  849         return;
  850 }
  851 
  852 /*
  853  * Release a spinlock from IRQL == DISPATCH_LEVEL.
  854  */
  855 
  856 static void
  857 NdisReleaseSpinLock(lock)
  858         ndis_spin_lock          *lock;
  859 {
  860         KeReleaseSpinLock(&lock->nsl_spinlock, lock->nsl_kirql);
  861         return;
  862 }
  863 
  864 /*
  865  * Acquire a spinlock when already running at IRQL == DISPATCH_LEVEL.
  866  */
  867 static void
  868 NdisDprAcquireSpinLock(lock)
  869         ndis_spin_lock          *lock;
  870 {
  871         KeAcquireSpinLockAtDpcLevel(&lock->nsl_spinlock);
  872         return;
  873 }
  874 
  875 /*
  876  * Release a spinlock without leaving IRQL == DISPATCH_LEVEL.
  877  */
  878 static void
  879 NdisDprReleaseSpinLock(lock)
  880         ndis_spin_lock          *lock;
  881 {
  882         KeReleaseSpinLockFromDpcLevel(&lock->nsl_spinlock);
  883         return;
  884 }
  885 
  886 static void
  887 NdisInitializeReadWriteLock(lock)
  888         ndis_rw_lock            *lock;
  889 {
  890         KeInitializeSpinLock(&lock->nrl_spinlock);
  891         bzero((char *)&lock->nrl_rsvd, sizeof(lock->nrl_rsvd));
  892         return;
  893 }
  894 
  895 static void
  896 NdisAcquireReadWriteLock(ndis_rw_lock *lock, uint8_t writeacc,
  897     ndis_lock_state *state)
  898 {
  899         if (writeacc == TRUE) {
  900                 KeAcquireSpinLock(&lock->nrl_spinlock, &state->nls_oldirql);
  901                 lock->nrl_rsvd[0]++;
  902         } else
  903                 lock->nrl_rsvd[1]++;
  904 
  905         return;
  906 }
  907 
  908 static void
  909 NdisReleaseReadWriteLock(lock, state)
  910         ndis_rw_lock            *lock;
  911         ndis_lock_state         *state;
  912 {
  913         if (lock->nrl_rsvd[0]) {
  914                 lock->nrl_rsvd[0]--;
  915                 KeReleaseSpinLock(&lock->nrl_spinlock, state->nls_oldirql);
  916         } else
  917                 lock->nrl_rsvd[1]--;
  918 
  919         return;
  920 }
  921 
  922 static uint32_t
  923 NdisReadPciSlotInformation(adapter, slot, offset, buf, len)
  924         ndis_handle             adapter;
  925         uint32_t                slot;
  926         uint32_t                offset;
  927         void                    *buf;
  928         uint32_t                len;
  929 {
  930         ndis_miniport_block     *block;
  931         int                     i;
  932         char                    *dest;
  933         device_t                dev;
  934 
  935         block = (ndis_miniport_block *)adapter;
  936         dest = buf;
  937         if (block == NULL)
  938                 return(0);
  939 
  940         dev = block->nmb_physdeviceobj->do_devext;
  941 
  942         /*
  943          * I have a test system consisting of a Sun w2100z
  944          * dual 2.4Ghz Opteron machine and an Atheros 802.11a/b/g
  945          * "Aries" miniPCI NIC. (The NIC is installed in the
  946          * machine using a miniPCI to PCI bus adapter card.)
  947          * When running in SMP mode, I found that
  948          * performing a large number of consecutive calls to
  949          * NdisReadPciSlotInformation() would result in a
  950          * sudden system reset (or in some cases a freeze).
  951          * My suspicion is that the multiple reads are somehow
  952          * triggering a fatal PCI bus error that leads to a
  953          * machine check. The 1us delay in the loop below
  954          * seems to prevent this problem.
  955          */
  956 
  957         for (i = 0; i < len; i++) {
  958                 DELAY(1);
  959                 dest[i] = pci_read_config(dev, i + offset, 1);
  960         }
  961 
  962         return(len);
  963 }
  964 
  965 static uint32_t
  966 NdisWritePciSlotInformation(adapter, slot, offset, buf, len)
  967         ndis_handle             adapter;
  968         uint32_t                slot;
  969         uint32_t                offset;
  970         void                    *buf;
  971         uint32_t                len;
  972 {
  973         ndis_miniport_block     *block;
  974         int                     i;
  975         char                    *dest;
  976         device_t                dev;
  977 
  978         block = (ndis_miniport_block *)adapter;
  979         dest = buf;
  980 
  981         if (block == NULL)
  982                 return(0);
  983 
  984         dev = block->nmb_physdeviceobj->do_devext;
  985         for (i = 0; i < len; i++) {
  986                 DELAY(1);
  987                 pci_write_config(dev, i + offset, dest[i], 1);
  988         }
  989 
  990         return(len);
  991 }
  992 
  993 /*
  994  * The errorlog routine uses a variable argument list, so we
  995  * have to declare it this way.
  996  */
  997 
  998 #define ERRMSGLEN 512
  999 static void
 1000 NdisWriteErrorLogEntry(ndis_handle adapter, ndis_error_code code,
 1001         uint32_t numerrors, ...)
 1002 {
 1003         ndis_miniport_block     *block;
 1004         va_list                 ap;
 1005         int                     i, error;
 1006         char                    *str = NULL;
 1007         uint16_t                flags;
 1008         device_t                dev;
 1009         driver_object           *drv;
 1010         struct ndis_softc       *sc;
 1011         struct ifnet            *ifp;
 1012         unicode_string          us;
 1013         ansi_string             as = { 0, 0, NULL };
 1014 
 1015         block = (ndis_miniport_block *)adapter;
 1016         dev = block->nmb_physdeviceobj->do_devext;
 1017         drv = block->nmb_deviceobj->do_drvobj;
 1018         sc = device_get_softc(dev);
 1019         ifp = sc->ifp;
 1020 
 1021         if (ifp != NULL && ifp->if_flags & IFF_DEBUG) {
 1022                 error = pe_get_message((vm_offset_t)drv->dro_driverstart,
 1023                     code, &str, &i, &flags);
 1024                 if (error == 0) {
 1025                         if (flags & MESSAGE_RESOURCE_UNICODE) {
 1026                                 RtlInitUnicodeString(&us, (uint16_t *)str);
 1027                                 if (RtlUnicodeStringToAnsiString(&as,
 1028                                     &us, TRUE) == STATUS_SUCCESS)
 1029                                         str = as.as_buf;
 1030                                 else
 1031                                         str = NULL;
 1032                         }
 1033                 }
 1034         }
 1035 
 1036         device_printf (dev, "NDIS ERROR: %x (%s)\n", code,
 1037             str == NULL ? "unknown error" : str);
 1038 
 1039         if (ifp != NULL && ifp->if_flags & IFF_DEBUG) {
 1040                 device_printf (dev, "NDIS NUMERRORS: %x\n", numerrors);
 1041                 va_start(ap, numerrors);
 1042                 for (i = 0; i < numerrors; i++)
 1043                         device_printf (dev, "argptr: %p\n",
 1044                             va_arg(ap, void *));
 1045                 va_end(ap);
 1046         }
 1047 
 1048         if (as.as_len)
 1049                 RtlFreeAnsiString(&as);
 1050 
 1051         return;
 1052 }
 1053 
 1054 static void
 1055 ndis_map_cb(arg, segs, nseg, error)
 1056         void                    *arg;
 1057         bus_dma_segment_t       *segs;
 1058         int                     nseg;
 1059         int                     error;
 1060 {
 1061         struct ndis_map_arg     *ctx;
 1062         int                     i;
 1063 
 1064         if (error)
 1065                 return;
 1066 
 1067         ctx = arg;
 1068 
 1069         for (i = 0; i < nseg; i++) {
 1070                 ctx->nma_fraglist[i].npu_physaddr.np_quad = segs[i].ds_addr;
 1071                 ctx->nma_fraglist[i].npu_len = segs[i].ds_len;
 1072         }
 1073 
 1074         ctx->nma_cnt = nseg;
 1075 
 1076         return;
 1077 }
 1078 
 1079 static void
 1080 NdisMStartBufferPhysicalMapping(ndis_handle adapter, ndis_buffer *buf,
 1081     uint32_t mapreg, uint8_t writedev, ndis_paddr_unit *addrarray,
 1082     uint32_t *arraysize)
 1083 {
 1084         ndis_miniport_block     *block;
 1085         struct ndis_softc       *sc;
 1086         struct ndis_map_arg     nma;
 1087         bus_dmamap_t            map;
 1088         int                     error;
 1089 
 1090         if (adapter == NULL)
 1091                 return;
 1092 
 1093         block = (ndis_miniport_block *)adapter;
 1094         sc = device_get_softc(block->nmb_physdeviceobj->do_devext);
 1095 
 1096         if (mapreg > sc->ndis_mmapcnt)
 1097                 return;
 1098 
 1099         map = sc->ndis_mmaps[mapreg];
 1100         nma.nma_fraglist = addrarray;
 1101 
 1102         error = bus_dmamap_load(sc->ndis_mtag, map,
 1103             MmGetMdlVirtualAddress(buf), MmGetMdlByteCount(buf), ndis_map_cb,
 1104             (void *)&nma, BUS_DMA_NOWAIT);
 1105 
 1106         if (error)
 1107                 return;
 1108 
 1109         bus_dmamap_sync(sc->ndis_mtag, map,
 1110             writedev ? BUS_DMASYNC_PREWRITE : BUS_DMASYNC_PREREAD);
 1111 
 1112         *arraysize = nma.nma_cnt;
 1113 
 1114         return;
 1115 }
 1116 
 1117 static void
 1118 NdisMCompleteBufferPhysicalMapping(adapter, buf, mapreg)
 1119         ndis_handle             adapter;
 1120         ndis_buffer             *buf;
 1121         uint32_t                mapreg;
 1122 {
 1123         ndis_miniport_block     *block;
 1124         struct ndis_softc       *sc;
 1125         bus_dmamap_t            map;
 1126 
 1127         if (adapter == NULL)
 1128                 return;
 1129 
 1130         block = (ndis_miniport_block *)adapter;
 1131         sc = device_get_softc(block->nmb_physdeviceobj->do_devext);
 1132 
 1133         if (mapreg > sc->ndis_mmapcnt)
 1134                 return;
 1135 
 1136         map = sc->ndis_mmaps[mapreg];
 1137 
 1138         bus_dmamap_sync(sc->ndis_mtag, map,
 1139             BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
 1140 
 1141         bus_dmamap_unload(sc->ndis_mtag, map);
 1142 
 1143         return;
 1144 }
 1145 
 1146 /*
 1147  * This is an older (?) timer init routine which doesn't
 1148  * accept a miniport context handle. Serialized miniports should
 1149  * never call this function.
 1150  */
 1151 
 1152 static void
 1153 NdisInitializeTimer(timer, func, ctx)
 1154         ndis_timer              *timer;
 1155         ndis_timer_function     func;
 1156         void                    *ctx;
 1157 {
 1158         KeInitializeTimer(&timer->nt_ktimer);
 1159         KeInitializeDpc(&timer->nt_kdpc, func, ctx);
 1160         KeSetImportanceDpc(&timer->nt_kdpc, KDPC_IMPORTANCE_LOW);
 1161 
 1162         return;
 1163 }
 1164 
 1165 static void
 1166 ndis_timercall(dpc, timer, sysarg1, sysarg2)
 1167         kdpc                    *dpc;
 1168         ndis_miniport_timer     *timer;
 1169         void                    *sysarg1;
 1170         void                    *sysarg2;
 1171 {
 1172         /*
 1173          * Since we're called as a DPC, we should be running
 1174          * at DISPATCH_LEVEL here. This means to acquire the
 1175          * spinlock, we can use KeAcquireSpinLockAtDpcLevel()
 1176          * rather than KeAcquireSpinLock().
 1177          */
 1178         if (NDIS_SERIALIZED(timer->nmt_block))
 1179                 KeAcquireSpinLockAtDpcLevel(&timer->nmt_block->nmb_lock);
 1180 
 1181         MSCALL4(timer->nmt_timerfunc, dpc, timer->nmt_timerctx,
 1182             sysarg1, sysarg2);
 1183 
 1184         if (NDIS_SERIALIZED(timer->nmt_block))
 1185                 KeReleaseSpinLockFromDpcLevel(&timer->nmt_block->nmb_lock);
 1186 
 1187         return;
 1188 }
 1189 
 1190 /*
 1191  * For a long time I wondered why there were two NDIS timer initialization
 1192  * routines, and why this one needed an NDIS_MINIPORT_TIMER and the
 1193  * MiniportAdapterHandle. The NDIS_MINIPORT_TIMER has its own callout
 1194  * function and context pointers separate from those in the DPC, which
 1195  * allows for another level of indirection: when the timer fires, we
 1196  * can have our own timer function invoked, and from there we can call
 1197  * the driver's function. But why go to all that trouble? Then it hit
 1198  * me: for serialized miniports, the timer callouts are not re-entrant.
 1199  * By trapping the callouts and having access to the MiniportAdapterHandle,
 1200  * we can protect the driver callouts by acquiring the NDIS serialization
 1201  * lock. This is essential for allowing serialized miniports to work
 1202  * correctly on SMP systems. On UP hosts, setting IRQL to DISPATCH_LEVEL
 1203  * is enough to prevent other threads from pre-empting you, but with
 1204  * SMP, you must acquire a lock as well, otherwise the other CPU is
 1205  * free to clobber you.
 1206  */
 1207 static void
 1208 NdisMInitializeTimer(timer, handle, func, ctx)
 1209         ndis_miniport_timer     *timer;
 1210         ndis_handle             handle;
 1211         ndis_timer_function     func;
 1212         void                    *ctx;
 1213 {
 1214         ndis_miniport_block     *block;
 1215         struct ndis_softc       *sc;
 1216 
 1217         block = (ndis_miniport_block *)handle;
 1218         sc = device_get_softc(block->nmb_physdeviceobj->do_devext);
 1219 
 1220         /* Save the driver's funcptr and context */
 1221 
 1222         timer->nmt_timerfunc = func;
 1223         timer->nmt_timerctx = ctx;
 1224         timer->nmt_block = handle;
 1225 
 1226         /*
 1227          * Set up the timer so it will call our intermediate DPC.
 1228          * Be sure to use the wrapped entry point, since
 1229          * ntoskrnl_run_dpc() expects to invoke a function with
 1230          * Microsoft calling conventions.
 1231          */
 1232         KeInitializeTimer(&timer->nmt_ktimer);
 1233         KeInitializeDpc(&timer->nmt_kdpc,
 1234             ndis_findwrap((funcptr)ndis_timercall), timer);
 1235         timer->nmt_ktimer.k_dpc = &timer->nmt_kdpc;
 1236 }
 1237 
 1238 /*
 1239  * In Windows, there's both an NdisMSetTimer() and an NdisSetTimer(),
 1240  * but the former is just a macro wrapper around the latter.
 1241  */
 1242 static void
 1243 NdisSetTimer(timer, msecs)
 1244         ndis_timer              *timer;
 1245         uint32_t                msecs;
 1246 {
 1247         /*
 1248          * KeSetTimer() wants the period in
 1249          * hundred nanosecond intervals.
 1250          */
 1251         KeSetTimer(&timer->nt_ktimer,
 1252             ((int64_t)msecs * -10000), &timer->nt_kdpc);
 1253 
 1254         return;
 1255 }
 1256 
 1257 static void
 1258 NdisMSetPeriodicTimer(timer, msecs)
 1259         ndis_miniport_timer     *timer;
 1260         uint32_t                msecs;
 1261 {
 1262         KeSetTimerEx(&timer->nmt_ktimer,
 1263             ((int64_t)msecs * -10000), msecs, &timer->nmt_kdpc);
 1264 
 1265         return;
 1266 }
 1267 
 1268 /*
 1269  * Technically, this is really NdisCancelTimer(), but we also
 1270  * (ab)use it for NdisMCancelTimer(), since in our implementation
 1271  * we don't need the extra info in the ndis_miniport_timer
 1272  * structure just to cancel a timer.
 1273  */
 1274 
 1275 static void
 1276 NdisMCancelTimer(timer, cancelled)
 1277         ndis_timer              *timer;
 1278         uint8_t                 *cancelled;
 1279 {
 1280 
 1281         *cancelled = KeCancelTimer(&timer->nt_ktimer);
 1282         return;
 1283 }
 1284 
 1285 static void
 1286 NdisMQueryAdapterResources(status, adapter, list, buflen)
 1287         ndis_status             *status;
 1288         ndis_handle             adapter;
 1289         ndis_resource_list      *list;
 1290         uint32_t                *buflen;
 1291 {
 1292         ndis_miniport_block     *block;
 1293         struct ndis_softc       *sc;
 1294         int                     rsclen;
 1295 
 1296         block = (ndis_miniport_block *)adapter;
 1297         sc = device_get_softc(block->nmb_physdeviceobj->do_devext);
 1298 
 1299         rsclen = sizeof(ndis_resource_list) +
 1300             (sizeof(cm_partial_resource_desc) * (sc->ndis_rescnt - 1));
 1301         if (*buflen < rsclen) {
 1302                 *buflen = rsclen;
 1303                 *status = NDIS_STATUS_INVALID_LENGTH;
 1304                 return;
 1305         }
 1306 
 1307         bcopy((char *)block->nmb_rlist, (char *)list, rsclen);
 1308         *status = NDIS_STATUS_SUCCESS;
 1309 
 1310         return;
 1311 }
 1312 
 1313 static ndis_status
 1314 NdisMRegisterIoPortRange(offset, adapter, port, numports)
 1315         void                    **offset;
 1316         ndis_handle             adapter;
 1317         uint32_t                port;
 1318         uint32_t                numports;
 1319 {
 1320         struct ndis_miniport_block      *block;
 1321         struct ndis_softc       *sc;
 1322 
 1323         if (adapter == NULL)
 1324                 return(NDIS_STATUS_FAILURE);
 1325 
 1326         block = (ndis_miniport_block *)adapter;
 1327         sc = device_get_softc(block->nmb_physdeviceobj->do_devext);
 1328 
 1329         if (sc->ndis_res_io == NULL)
 1330                 return(NDIS_STATUS_FAILURE);
 1331 
 1332         /* Don't let the device map more ports than we have. */
 1333         if (rman_get_size(sc->ndis_res_io) < numports)
 1334                 return(NDIS_STATUS_INVALID_LENGTH);
 1335 
 1336         *offset = (void *)rman_get_start(sc->ndis_res_io);
 1337 
 1338         return(NDIS_STATUS_SUCCESS);
 1339 }
 1340 
 1341 static void
 1342 NdisMDeregisterIoPortRange(adapter, port, numports, offset)
 1343         ndis_handle             adapter;
 1344         uint32_t                port;
 1345         uint32_t                numports;
 1346         void                    *offset;
 1347 {
 1348         return;
 1349 }
 1350 
 1351 static void
 1352 NdisReadNetworkAddress(status, addr, addrlen, adapter)
 1353         ndis_status             *status;
 1354         void                    **addr;
 1355         uint32_t                *addrlen;
 1356         ndis_handle             adapter;
 1357 {
 1358         struct ndis_softc       *sc;
 1359         ndis_miniport_block     *block;
 1360         uint8_t                 empty[] = { 0, 0, 0, 0, 0, 0 };
 1361 
 1362         block = (ndis_miniport_block *)adapter;
 1363         sc = device_get_softc(block->nmb_physdeviceobj->do_devext);
 1364         if (sc->ifp == NULL) {
 1365                 *status = NDIS_STATUS_FAILURE;
 1366                 return;
 1367         }
 1368 
 1369 #ifdef IFP2ENADDR
 1370         if (bcmp(IFP2ENADDR(sc->ifp), empty, ETHER_ADDR_LEN) == 0)
 1371 #elif __FreeBSD_version >= 700000
 1372         if (sc->ifp->if_addr == NULL ||
 1373             bcmp(IF_LLADDR(sc->ifp), empty, ETHER_ADDR_LEN) == 0)
 1374 #else
 1375         if (bcmp(sc->arpcom.ac_enaddr, empty, ETHER_ADDR_LEN) == 0)
 1376 #endif
 1377                 *status = NDIS_STATUS_FAILURE;
 1378         else {
 1379 #ifdef IFP2ENADDR
 1380                 *addr = IFP2ENADDR(sc->ifp);
 1381 #elif __FreeBSD_version >= 700000
 1382                 *addr = IF_LLADDR(sc->ifp);
 1383 #else
 1384                 *addr = sc->arpcom.ac_enaddr;
 1385 #endif
 1386                 *addrlen = ETHER_ADDR_LEN;
 1387                 *status = NDIS_STATUS_SUCCESS;
 1388         }
 1389 
 1390         return;
 1391 }
 1392 
 1393 static ndis_status
 1394 NdisQueryMapRegisterCount(bustype, cnt)
 1395         uint32_t                bustype;
 1396         uint32_t                *cnt;
 1397 {
 1398         *cnt = 8192;
 1399         return(NDIS_STATUS_SUCCESS);
 1400 }
 1401 
 1402 static ndis_status
 1403 NdisMAllocateMapRegisters(ndis_handle adapter, uint32_t dmachannel,
 1404     uint8_t dmasize, uint32_t physmapneeded, uint32_t maxmap)
 1405 {
 1406         struct ndis_softc       *sc;
 1407         ndis_miniport_block     *block;
 1408         int                     error, i, nseg = NDIS_MAXSEG;
 1409 
 1410         block = (ndis_miniport_block *)adapter;
 1411         sc = device_get_softc(block->nmb_physdeviceobj->do_devext);
 1412 
 1413         sc->ndis_mmaps = malloc(sizeof(bus_dmamap_t) * physmapneeded,
 1414             M_DEVBUF, M_NOWAIT|M_ZERO);
 1415 
 1416         if (sc->ndis_mmaps == NULL)
 1417                 return(NDIS_STATUS_RESOURCES);
 1418 
 1419         error = bus_dma_tag_create(sc->ndis_parent_tag, ETHER_ALIGN, 0,
 1420             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL,
 1421             NULL, maxmap * nseg, nseg, maxmap, BUS_DMA_ALLOCNOW,
 1422             NULL, NULL, &sc->ndis_mtag);
 1423 
 1424         if (error) {
 1425                 free(sc->ndis_mmaps, M_DEVBUF);
 1426                 return(NDIS_STATUS_RESOURCES);
 1427         }
 1428 
 1429         for (i = 0; i < physmapneeded; i++)
 1430                 bus_dmamap_create(sc->ndis_mtag, 0, &sc->ndis_mmaps[i]);
 1431 
 1432         sc->ndis_mmapcnt = physmapneeded;
 1433 
 1434         return(NDIS_STATUS_SUCCESS);
 1435 }
 1436 
 1437 static void
 1438 NdisMFreeMapRegisters(adapter)
 1439         ndis_handle             adapter;
 1440 {
 1441         struct ndis_softc       *sc;
 1442         ndis_miniport_block     *block;
 1443         int                     i;
 1444 
 1445         block = (ndis_miniport_block *)adapter;
 1446         sc = device_get_softc(block->nmb_physdeviceobj->do_devext);
 1447 
 1448         for (i = 0; i < sc->ndis_mmapcnt; i++)
 1449                 bus_dmamap_destroy(sc->ndis_mtag, sc->ndis_mmaps[i]);
 1450 
 1451         free(sc->ndis_mmaps, M_DEVBUF);
 1452 
 1453         bus_dma_tag_destroy(sc->ndis_mtag);
 1454 
 1455         return;
 1456 }
 1457 
 1458 static void
 1459 ndis_mapshared_cb(arg, segs, nseg, error)
 1460         void                    *arg;
 1461         bus_dma_segment_t       *segs;
 1462         int                     nseg;
 1463         int                     error;
 1464 {
 1465         ndis_physaddr           *p;
 1466 
 1467         if (error || nseg > 1)
 1468                 return;
 1469 
 1470         p = arg;
 1471 
 1472         p->np_quad = segs[0].ds_addr;
 1473 
 1474         return;
 1475 }
 1476 
 1477 /*
 1478  * This maps to bus_dmamem_alloc().
 1479  */
 1480 
 1481 static void
 1482 NdisMAllocateSharedMemory(ndis_handle adapter, uint32_t len, uint8_t cached,
 1483     void **vaddr, ndis_physaddr *paddr)
 1484 {
 1485         ndis_miniport_block     *block;
 1486         struct ndis_softc       *sc;
 1487         struct ndis_shmem       *sh;
 1488         int                     error;
 1489 
 1490         if (adapter == NULL)
 1491                 return;
 1492 
 1493         block = (ndis_miniport_block *)adapter;
 1494         sc = device_get_softc(block->nmb_physdeviceobj->do_devext);
 1495 
 1496         sh = malloc(sizeof(struct ndis_shmem), M_DEVBUF, M_NOWAIT|M_ZERO);
 1497         if (sh == NULL)
 1498                 return;
 1499 
 1500         InitializeListHead(&sh->ndis_list);
 1501 
 1502         /*
 1503          * When performing shared memory allocations, create a tag
 1504          * with a lowaddr limit that restricts physical memory mappings
 1505          * so that they all fall within the first 1GB of memory.
 1506          * At least one device/driver combination (Linksys Instant
 1507          * Wireless PCI Card V2.7, Broadcom 802.11b) seems to have
 1508          * problems with performing DMA operations with physical
 1509          * addresses that lie above the 1GB mark. I don't know if this
 1510          * is a hardware limitation or if the addresses are being
 1511          * truncated within the driver, but this seems to be the only
 1512          * way to make these cards work reliably in systems with more
 1513          * than 1GB of physical memory.
 1514          */
 1515 
 1516         error = bus_dma_tag_create(sc->ndis_parent_tag, 64,
 1517             0, NDIS_BUS_SPACE_SHARED_MAXADDR, BUS_SPACE_MAXADDR, NULL,
 1518             NULL, len, 1, len, BUS_DMA_ALLOCNOW, NULL, NULL,
 1519             &sh->ndis_stag);
 1520 
 1521         if (error) {
 1522                 free(sh, M_DEVBUF);
 1523                 return;
 1524         }
 1525 
 1526         error = bus_dmamem_alloc(sh->ndis_stag, vaddr,
 1527             BUS_DMA_NOWAIT | BUS_DMA_ZERO, &sh->ndis_smap);
 1528 
 1529         if (error) {
 1530                 bus_dma_tag_destroy(sh->ndis_stag);
 1531                 free(sh, M_DEVBUF);
 1532                 return;
 1533         }
 1534 
 1535         error = bus_dmamap_load(sh->ndis_stag, sh->ndis_smap, *vaddr,
 1536             len, ndis_mapshared_cb, (void *)paddr, BUS_DMA_NOWAIT);
 1537 
 1538         if (error) {
 1539                 bus_dmamem_free(sh->ndis_stag, *vaddr, sh->ndis_smap);
 1540                 bus_dma_tag_destroy(sh->ndis_stag);
 1541                 free(sh, M_DEVBUF);
 1542                 return;
 1543         }
 1544 
 1545         /*
 1546          * Save the physical address along with the source address.
 1547          * The AirGo MIMO driver will call NdisMFreeSharedMemory()
 1548          * with a bogus virtual address sometimes, but with a valid
 1549          * physical address. To keep this from causing trouble, we
 1550          * use the physical address to as a sanity check in case
 1551          * searching based on the virtual address fails.
 1552          */
 1553 
 1554         NDIS_LOCK(sc);
 1555         sh->ndis_paddr.np_quad = paddr->np_quad;
 1556         sh->ndis_saddr = *vaddr;
 1557         InsertHeadList((&sc->ndis_shlist), (&sh->ndis_list));
 1558         NDIS_UNLOCK(sc);
 1559 
 1560         return;
 1561 }
 1562 
 1563 struct ndis_allocwork {
 1564         uint32_t                na_len;
 1565         uint8_t                 na_cached;
 1566         void                    *na_ctx;
 1567         io_workitem             *na_iw;
 1568 };
 1569 
 1570 static void
 1571 ndis_asyncmem_complete(dobj, arg)
 1572         device_object           *dobj;
 1573         void                    *arg;
 1574 {
 1575         ndis_miniport_block     *block;
 1576         struct ndis_softc       *sc;
 1577         struct ndis_allocwork   *w;
 1578         void                    *vaddr;
 1579         ndis_physaddr           paddr;
 1580         ndis_allocdone_handler  donefunc;
 1581 
 1582         w = arg;
 1583         block = (ndis_miniport_block *)dobj->do_devext;
 1584         sc = device_get_softc(block->nmb_physdeviceobj->do_devext);
 1585 
 1586         vaddr = NULL;
 1587         paddr.np_quad = 0;
 1588 
 1589         donefunc = sc->ndis_chars->nmc_allocate_complete_func;
 1590         NdisMAllocateSharedMemory(block, w->na_len,
 1591             w->na_cached, &vaddr, &paddr);
 1592         MSCALL5(donefunc, block, vaddr, &paddr, w->na_len, w->na_ctx);
 1593 
 1594         IoFreeWorkItem(w->na_iw);
 1595         free(w, M_DEVBUF);
 1596 
 1597         return;
 1598 }
 1599 
 1600 static ndis_status
 1601 NdisMAllocateSharedMemoryAsync(ndis_handle adapter, uint32_t len,
 1602     uint8_t cached, void *ctx)
 1603 {
 1604         ndis_miniport_block     *block;
 1605         struct ndis_allocwork   *w;
 1606         io_workitem             *iw;
 1607         io_workitem_func        ifw;
 1608 
 1609         if (adapter == NULL)
 1610                 return(NDIS_STATUS_FAILURE);
 1611 
 1612         block = adapter;
 1613 
 1614         iw = IoAllocateWorkItem(block->nmb_deviceobj);
 1615         if (iw == NULL)
 1616                 return(NDIS_STATUS_FAILURE);
 1617 
 1618         w = malloc(sizeof(struct ndis_allocwork), M_TEMP, M_NOWAIT);
 1619 
 1620         if (w == NULL)
 1621                 return(NDIS_STATUS_FAILURE);
 1622 
 1623         w->na_cached = cached;
 1624         w->na_len = len;
 1625         w->na_ctx = ctx;
 1626         w->na_iw = iw;
 1627 
 1628         ifw = (io_workitem_func)ndis_findwrap((funcptr)ndis_asyncmem_complete);
 1629         IoQueueWorkItem(iw, ifw, WORKQUEUE_DELAYED, w);
 1630 
 1631         return(NDIS_STATUS_PENDING);
 1632 }
 1633 
 1634 static void
 1635 NdisMFreeSharedMemory(ndis_handle adapter, uint32_t len, uint8_t cached,
 1636     void *vaddr, ndis_physaddr paddr)
 1637 {
 1638         ndis_miniport_block     *block;
 1639         struct ndis_softc       *sc;
 1640         struct ndis_shmem       *sh = NULL;
 1641         list_entry              *l;
 1642 
 1643         if (vaddr == NULL || adapter == NULL)
 1644                 return;
 1645 
 1646         block = (ndis_miniport_block *)adapter;
 1647         sc = device_get_softc(block->nmb_physdeviceobj->do_devext);
 1648 
 1649         /* Sanity check: is list empty? */
 1650 
 1651         if (IsListEmpty(&sc->ndis_shlist))
 1652                 return;
 1653 
 1654         NDIS_LOCK(sc);
 1655         l = sc->ndis_shlist.nle_flink;
 1656         while (l != &sc->ndis_shlist) {
 1657                 sh = CONTAINING_RECORD(l, struct ndis_shmem, ndis_list);
 1658                 if (sh->ndis_saddr == vaddr)
 1659                         break;
 1660                 /*
 1661                  * Check the physaddr too, just in case the driver lied
 1662                  * about the virtual address.
 1663                  */
 1664                 if (sh->ndis_paddr.np_quad == paddr.np_quad)
 1665                         break;
 1666                 l = l->nle_flink;
 1667         }
 1668 
 1669         if (sh == NULL) {
 1670                 NDIS_UNLOCK(sc);
 1671                 printf("NDIS: buggy driver tried to free "
 1672                     "invalid shared memory: vaddr: %p paddr: 0x%jx\n",
 1673                     vaddr, (uintmax_t)paddr.np_quad);
 1674                 return;
 1675         }
 1676 
 1677         RemoveEntryList(&sh->ndis_list);
 1678 
 1679         NDIS_UNLOCK(sc);
 1680 
 1681         bus_dmamap_unload(sh->ndis_stag, sh->ndis_smap);
 1682         bus_dmamem_free(sh->ndis_stag, sh->ndis_saddr, sh->ndis_smap);
 1683         bus_dma_tag_destroy(sh->ndis_stag);
 1684 
 1685         free(sh, M_DEVBUF);
 1686 
 1687         return;
 1688 }
 1689 
 1690 static ndis_status
 1691 NdisMMapIoSpace(vaddr, adapter, paddr, len)
 1692         void                    **vaddr;
 1693         ndis_handle             adapter;
 1694         ndis_physaddr           paddr;
 1695         uint32_t                len;
 1696 {
 1697         if (adapter == NULL)
 1698                 return(NDIS_STATUS_FAILURE);
 1699 
 1700         *vaddr = MmMapIoSpace(paddr.np_quad, len, 0);
 1701 
 1702         if (*vaddr == NULL)
 1703                 return(NDIS_STATUS_FAILURE);
 1704 
 1705         return(NDIS_STATUS_SUCCESS);
 1706 }
 1707 
 1708 static void
 1709 NdisMUnmapIoSpace(adapter, vaddr, len)
 1710         ndis_handle             adapter;
 1711         void                    *vaddr;
 1712         uint32_t                len;
 1713 {
 1714         MmUnmapIoSpace(vaddr, len);
 1715         return;
 1716 }
 1717 
 1718 static uint32_t
 1719 NdisGetCacheFillSize(void)
 1720 {
 1721         return(128);
 1722 }
 1723 
 1724 static uint32_t
 1725 NdisMGetDmaAlignment(handle)
 1726         ndis_handle             handle;
 1727 {
 1728         return(16);
 1729 }
 1730 
 1731 /*
 1732  * NDIS has two methods for dealing with NICs that support DMA.
 1733  * One is to just pass packets to the driver and let it call
 1734  * NdisMStartBufferPhysicalMapping() to map each buffer in the packet
 1735  * all by itself, and the other is to let the NDIS library handle the
 1736  * buffer mapping internally, and hand the driver an already populated
 1737  * scatter/gather fragment list. If the driver calls
 1738  * NdisMInitializeScatterGatherDma(), it wants to use the latter
 1739  * method.
 1740  */
 1741 
 1742 static ndis_status
 1743 NdisMInitializeScatterGatherDma(ndis_handle adapter, uint8_t is64,
 1744     uint32_t maxphysmap)
 1745 {
 1746         struct ndis_softc       *sc;
 1747         ndis_miniport_block     *block;
 1748         int                     error;
 1749 
 1750         if (adapter == NULL)
 1751                 return(NDIS_STATUS_FAILURE);
 1752         block = (ndis_miniport_block *)adapter;
 1753         sc = device_get_softc(block->nmb_physdeviceobj->do_devext);
 1754 
 1755         /* Don't do this twice. */
 1756         if (sc->ndis_sc == 1)
 1757                 return(NDIS_STATUS_SUCCESS);
 1758 
 1759         error = bus_dma_tag_create(sc->ndis_parent_tag, ETHER_ALIGN, 0,
 1760             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
 1761             MCLBYTES * NDIS_MAXSEG, NDIS_MAXSEG, MCLBYTES, BUS_DMA_ALLOCNOW,
 1762             NULL, NULL, &sc->ndis_ttag);
 1763 
 1764         sc->ndis_sc = 1;
 1765 
 1766         return(NDIS_STATUS_SUCCESS);
 1767 }
 1768 
 1769 void
 1770 NdisAllocatePacketPool(status, pool, descnum, protrsvdlen)
 1771         ndis_status             *status;
 1772         ndis_handle             *pool;
 1773         uint32_t                descnum;
 1774         uint32_t                protrsvdlen;
 1775 {
 1776         ndis_packet_pool        *p;
 1777         ndis_packet             *packets;
 1778         int                     i;
 1779 
 1780         p = ExAllocatePoolWithTag(NonPagedPool, sizeof(ndis_packet_pool), 0);
 1781         if (p == NULL) {
 1782                 *status = NDIS_STATUS_RESOURCES;
 1783                 return;
 1784         }
 1785 
 1786         p->np_cnt = descnum + NDIS_POOL_EXTRA;
 1787         p->np_protrsvd = protrsvdlen;
 1788         p->np_len = sizeof(ndis_packet) + protrsvdlen;
 1789 
 1790         packets = ExAllocatePoolWithTag(NonPagedPool, p->np_cnt *
 1791             p->np_len, 0);
 1792 
 1793 
 1794         if (packets == NULL) {
 1795                 ExFreePool(p);
 1796                 *status = NDIS_STATUS_RESOURCES;
 1797                 return;
 1798         }
 1799 
 1800         p->np_pktmem = packets;
 1801 
 1802         for (i = 0; i < p->np_cnt; i++)
 1803                 InterlockedPushEntrySList(&p->np_head,
 1804                     (struct slist_entry *)&packets[i]);
 1805 
 1806 #ifdef NDIS_DEBUG_PACKETS 
 1807         p->np_dead = 0; 
 1808         KeInitializeSpinLock(&p->np_lock);
 1809         KeInitializeEvent(&p->np_event, EVENT_TYPE_NOTIFY, TRUE);
 1810 #endif
 1811 
 1812         *pool = p; 
 1813         *status = NDIS_STATUS_SUCCESS;
 1814         return;
 1815 }
 1816 
 1817 void
 1818 NdisAllocatePacketPoolEx(status, pool, descnum, oflowdescnum, protrsvdlen)
 1819         ndis_status             *status;
 1820         ndis_handle             *pool;
 1821         uint32_t                descnum;
 1822         uint32_t                oflowdescnum;
 1823         uint32_t                protrsvdlen;
 1824 {
 1825         return(NdisAllocatePacketPool(status, pool,
 1826             descnum + oflowdescnum, protrsvdlen));
 1827 }
 1828 
 1829 uint32_t
 1830 NdisPacketPoolUsage(pool)
 1831         ndis_handle             pool;
 1832 {
 1833         ndis_packet_pool        *p;
 1834 
 1835         p = (ndis_packet_pool *)pool;
 1836         return(p->np_cnt - ExQueryDepthSList(&p->np_head));
 1837 }
 1838 
 1839 void
 1840 NdisFreePacketPool(pool)
 1841         ndis_handle             pool;
 1842 {
 1843         ndis_packet_pool        *p;
 1844         int                     usage;
 1845 #ifdef NDIS_DEBUG_PACKETS
 1846         uint8_t                 irql;
 1847 #endif
 1848 
 1849         p = (ndis_packet_pool *)pool;
 1850 
 1851 #ifdef NDIS_DEBUG_PACKETS
 1852         KeAcquireSpinLock(&p->np_lock, &irql);
 1853 #endif
 1854 
 1855         usage = NdisPacketPoolUsage(pool);
 1856 
 1857 #ifdef NDIS_DEBUG_PACKETS
 1858         if (usage) {
 1859                 p->np_dead = 1;
 1860                 KeResetEvent(&p->np_event);
 1861                 KeReleaseSpinLock(&p->np_lock, irql);
 1862                 KeWaitForSingleObject(&p->np_event, 0, 0, FALSE, NULL);
 1863         } else
 1864                 KeReleaseSpinLock(&p->np_lock, irql);
 1865 #endif
 1866 
 1867         ExFreePool(p->np_pktmem);
 1868         ExFreePool(p);
 1869 
 1870         return;
 1871 }
 1872 
 1873 void
 1874 NdisAllocatePacket(status, packet, pool)
 1875         ndis_status             *status;
 1876         ndis_packet             **packet;
 1877         ndis_handle             pool;
 1878 {
 1879         ndis_packet_pool        *p;
 1880         ndis_packet             *pkt;
 1881 #ifdef NDIS_DEBUG_PACKETS
 1882         uint8_t                 irql;
 1883 #endif
 1884 
 1885         p = (ndis_packet_pool *)pool;
 1886 
 1887 #ifdef NDIS_DEBUG_PACKETS
 1888         KeAcquireSpinLock(&p->np_lock, &irql);
 1889         if (p->np_dead) {
 1890                 KeReleaseSpinLock(&p->np_lock, irql);
 1891                 printf("NDIS: tried to allocate packet from dead pool %p\n",
 1892                     pool);
 1893                 *status = NDIS_STATUS_RESOURCES;
 1894                 return;
 1895         }
 1896 #endif
 1897 
 1898         pkt = (ndis_packet *)InterlockedPopEntrySList(&p->np_head);
 1899 
 1900 #ifdef NDIS_DEBUG_PACKETS
 1901         KeReleaseSpinLock(&p->np_lock, irql);
 1902 #endif
 1903 
 1904         if (pkt == NULL) {
 1905                 *status = NDIS_STATUS_RESOURCES;
 1906                 return;
 1907         }
 1908 
 1909 
 1910         bzero((char *)pkt, sizeof(ndis_packet));
 1911 
 1912         /* Save pointer to the pool. */
 1913         pkt->np_private.npp_pool = pool;
 1914 
 1915         /* Set the oob offset pointer. Lots of things expect this. */
 1916         pkt->np_private.npp_packetooboffset = offsetof(ndis_packet, np_oob);
 1917 
 1918         /*
 1919          * We must initialize the packet flags correctly in order
 1920          * for the NDIS_SET_PACKET_MEDIA_SPECIFIC_INFO() and
 1921          * NDIS_GET_PACKET_MEDIA_SPECIFIC_INFO() macros to work
 1922          * correctly.
 1923          */
 1924         pkt->np_private.npp_ndispktflags = NDIS_PACKET_ALLOCATED_BY_NDIS;
 1925         pkt->np_private.npp_validcounts = FALSE;
 1926 
 1927         *packet = pkt;
 1928 
 1929         *status = NDIS_STATUS_SUCCESS;
 1930 
 1931         return;
 1932 }
 1933 
 1934 void
 1935 NdisFreePacket(packet)
 1936         ndis_packet             *packet;
 1937 {
 1938         ndis_packet_pool        *p;
 1939 #ifdef NDIS_DEBUG_PACKETS
 1940         uint8_t                 irql;
 1941 #endif
 1942 
 1943         p = (ndis_packet_pool *)packet->np_private.npp_pool;
 1944 
 1945 #ifdef NDIS_DEBUG_PACKETS
 1946         KeAcquireSpinLock(&p->np_lock, &irql);
 1947 #endif
 1948 
 1949         InterlockedPushEntrySList(&p->np_head, (slist_entry *)packet);
 1950 
 1951 #ifdef NDIS_DEBUG_PACKETS
 1952         if (p->np_dead) {
 1953                 if (ExQueryDepthSList(&p->np_head) == p->np_cnt)
 1954                         KeSetEvent(&p->np_event, IO_NO_INCREMENT, FALSE);
 1955         }
 1956         KeReleaseSpinLock(&p->np_lock, irql);
 1957 #endif
 1958 
 1959         return;
 1960 }
 1961 
 1962 static void
 1963 NdisUnchainBufferAtFront(packet, buf)
 1964         ndis_packet             *packet;
 1965         ndis_buffer             **buf;
 1966 {
 1967         ndis_packet_private     *priv;
 1968 
 1969         if (packet == NULL || buf == NULL)
 1970                 return;
 1971 
 1972         priv = &packet->np_private;
 1973 
 1974         priv->npp_validcounts = FALSE;
 1975 
 1976         if (priv->npp_head == priv->npp_tail) {
 1977                 *buf = priv->npp_head;
 1978                 priv->npp_head = priv->npp_tail = NULL;
 1979         } else {
 1980                 *buf = priv->npp_head;
 1981                 priv->npp_head = (*buf)->mdl_next;
 1982         }
 1983 
 1984         return;
 1985 }
 1986 
 1987 static void
 1988 NdisUnchainBufferAtBack(packet, buf)
 1989         ndis_packet             *packet;
 1990         ndis_buffer             **buf;
 1991 {
 1992         ndis_packet_private     *priv;
 1993         ndis_buffer             *tmp;
 1994 
 1995         if (packet == NULL || buf == NULL)
 1996                 return;
 1997 
 1998         priv = &packet->np_private;
 1999 
 2000         priv->npp_validcounts = FALSE;
 2001 
 2002         if (priv->npp_head == priv->npp_tail) {
 2003                 *buf = priv->npp_head;
 2004                 priv->npp_head = priv->npp_tail = NULL;
 2005         } else {
 2006                 *buf = priv->npp_tail;
 2007                 tmp = priv->npp_head;
 2008                 while (tmp->mdl_next != priv->npp_tail)
 2009                         tmp = tmp->mdl_next;
 2010                 priv->npp_tail = tmp;
 2011                 tmp->mdl_next = NULL;
 2012         }
 2013 
 2014         return;
 2015 }
 2016 
 2017 /*
 2018  * The NDIS "buffer" is really an MDL (memory descriptor list)
 2019  * which is used to describe a buffer in a way that allows it
 2020  * to mapped into different contexts. We have to be careful how
 2021  * we handle them: in some versions of Windows, the NdisFreeBuffer()
 2022  * routine is an actual function in the NDIS API, but in others
 2023  * it's just a macro wrapper around IoFreeMdl(). There's really
 2024  * no way to use the 'descnum' parameter to count how many
 2025  * "buffers" are allocated since in order to use IoFreeMdl() to
 2026  * dispose of a buffer, we have to use IoAllocateMdl() to allocate
 2027  * them, and IoAllocateMdl() just grabs them out of the heap.
 2028  */
 2029 
 2030 static void
 2031 NdisAllocateBufferPool(status, pool, descnum)
 2032         ndis_status             *status;
 2033         ndis_handle             *pool;
 2034         uint32_t                descnum;
 2035 {
 2036 
 2037         /*
 2038          * The only thing we can really do here is verify that descnum
 2039          * is a reasonable value, but I really don't know what to check
 2040          * it against.
 2041          */
 2042 
 2043         *pool = NonPagedPool;
 2044         *status = NDIS_STATUS_SUCCESS;
 2045         return;
 2046 }
 2047 
 2048 static void
 2049 NdisFreeBufferPool(pool)
 2050         ndis_handle             pool;
 2051 {
 2052         return;
 2053 }
 2054 
 2055 static void
 2056 NdisAllocateBuffer(status, buffer, pool, vaddr, len)
 2057         ndis_status             *status;
 2058         ndis_buffer             **buffer;
 2059         ndis_handle             pool;
 2060         void                    *vaddr;
 2061         uint32_t                len;
 2062 {
 2063         ndis_buffer             *buf;
 2064 
 2065         buf = IoAllocateMdl(vaddr, len, FALSE, FALSE, NULL);
 2066         if (buf == NULL) {
 2067                 *status = NDIS_STATUS_RESOURCES;
 2068                 return;
 2069         }
 2070 
 2071         MmBuildMdlForNonPagedPool(buf);
 2072 
 2073         *buffer = buf;
 2074         *status = NDIS_STATUS_SUCCESS;
 2075 
 2076         return;
 2077 }
 2078 
 2079 static void
 2080 NdisFreeBuffer(buf)
 2081         ndis_buffer             *buf;
 2082 {
 2083         IoFreeMdl(buf);
 2084         return;
 2085 }
 2086 
 2087 /* Aw c'mon. */
 2088 
 2089 static uint32_t
 2090 NdisBufferLength(buf)
 2091         ndis_buffer             *buf;
 2092 {
 2093         return(MmGetMdlByteCount(buf));
 2094 }
 2095 
 2096 /*
 2097  * Get the virtual address and length of a buffer.
 2098  * Note: the vaddr argument is optional.
 2099  */
 2100 
 2101 static void
 2102 NdisQueryBuffer(buf, vaddr, len)
 2103         ndis_buffer             *buf;
 2104         void                    **vaddr;
 2105         uint32_t                *len;
 2106 {
 2107         if (vaddr != NULL)
 2108                 *vaddr = MmGetMdlVirtualAddress(buf);
 2109         *len = MmGetMdlByteCount(buf);
 2110 
 2111         return;
 2112 }
 2113 
 2114 /* Same as above -- we don't care about the priority. */
 2115 
 2116 static void
 2117 NdisQueryBufferSafe(buf, vaddr, len, prio)
 2118         ndis_buffer             *buf;
 2119         void                    **vaddr;
 2120         uint32_t                *len;
 2121         uint32_t                prio;
 2122 {
 2123         if (vaddr != NULL)
 2124                 *vaddr = MmGetMdlVirtualAddress(buf);
 2125         *len = MmGetMdlByteCount(buf);
 2126 
 2127         return;
 2128 }
 2129 
 2130 /* Damnit Microsoft!! How many ways can you do the same thing?! */
 2131 
 2132 static void *
 2133 NdisBufferVirtualAddress(buf)
 2134         ndis_buffer             *buf;
 2135 {
 2136         return(MmGetMdlVirtualAddress(buf));
 2137 }
 2138 
 2139 static void *
 2140 NdisBufferVirtualAddressSafe(buf, prio)
 2141         ndis_buffer             *buf;
 2142         uint32_t                prio;
 2143 {
 2144         return(MmGetMdlVirtualAddress(buf));
 2145 }
 2146 
 2147 static void
 2148 NdisAdjustBufferLength(buf, len)
 2149         ndis_buffer             *buf;
 2150         int                     len;
 2151 {
 2152         MmGetMdlByteCount(buf) = len;
 2153 
 2154         return;
 2155 }
 2156 
 2157 static uint32_t
 2158 NdisInterlockedIncrement(addend)
 2159         uint32_t                *addend;
 2160 {
 2161         atomic_add_long((u_long *)addend, 1);
 2162         return(*addend);
 2163 }
 2164 
 2165 static uint32_t
 2166 NdisInterlockedDecrement(addend)
 2167         uint32_t                *addend;
 2168 {
 2169         atomic_subtract_long((u_long *)addend, 1);
 2170         return(*addend);
 2171 }
 2172 
 2173 static void
 2174 NdisInitializeEvent(event)
 2175         ndis_event              *event;
 2176 {
 2177         /*
 2178          * NDIS events are always notification
 2179          * events, and should be initialized to the
 2180          * not signaled state.
 2181          */
 2182         KeInitializeEvent(&event->ne_event, EVENT_TYPE_NOTIFY, FALSE);
 2183         return;
 2184 }
 2185 
 2186 static void
 2187 NdisSetEvent(event)
 2188         ndis_event              *event;
 2189 {
 2190         KeSetEvent(&event->ne_event, IO_NO_INCREMENT, FALSE);
 2191         return;
 2192 }
 2193 
 2194 static void
 2195 NdisResetEvent(event)
 2196         ndis_event              *event;
 2197 {
 2198         KeResetEvent(&event->ne_event);
 2199         return;
 2200 }
 2201 
 2202 static uint8_t
 2203 NdisWaitEvent(event, msecs)
 2204         ndis_event              *event;
 2205         uint32_t                msecs;
 2206 {
 2207         int64_t                 duetime;
 2208         uint32_t                rval;
 2209 
 2210         duetime = ((int64_t)msecs * -10000);
 2211         rval = KeWaitForSingleObject(event,
 2212             0, 0, TRUE, msecs ? & duetime : NULL);
 2213 
 2214         if (rval == STATUS_TIMEOUT)
 2215                 return(FALSE);
 2216 
 2217         return(TRUE);
 2218 }
 2219 
 2220 static ndis_status
 2221 NdisUnicodeStringToAnsiString(dstr, sstr)
 2222         ansi_string             *dstr;
 2223         unicode_string          *sstr;
 2224 {
 2225         uint32_t                rval;
 2226 
 2227         rval = RtlUnicodeStringToAnsiString(dstr, sstr, FALSE);
 2228 
 2229         if (rval == STATUS_INSUFFICIENT_RESOURCES)
 2230                 return(NDIS_STATUS_RESOURCES);
 2231         if (rval)
 2232                 return(NDIS_STATUS_FAILURE);
 2233 
 2234         return (NDIS_STATUS_SUCCESS);
 2235 }
 2236 
 2237 static ndis_status
 2238 NdisAnsiStringToUnicodeString(dstr, sstr)
 2239         unicode_string          *dstr;
 2240         ansi_string             *sstr;
 2241 {
 2242         uint32_t                rval;
 2243 
 2244         rval = RtlAnsiStringToUnicodeString(dstr, sstr, FALSE);
 2245 
 2246         if (rval == STATUS_INSUFFICIENT_RESOURCES)
 2247                 return(NDIS_STATUS_RESOURCES);
 2248         if (rval)
 2249                 return(NDIS_STATUS_FAILURE);
 2250 
 2251         return (NDIS_STATUS_SUCCESS);
 2252 }
 2253 
 2254 static ndis_status
 2255 NdisMPciAssignResources(adapter, slot, list)
 2256         ndis_handle             adapter;
 2257         uint32_t                slot;
 2258         ndis_resource_list      **list;
 2259 {
 2260         ndis_miniport_block     *block;
 2261 
 2262         if (adapter == NULL || list == NULL)
 2263                 return (NDIS_STATUS_FAILURE);
 2264 
 2265         block = (ndis_miniport_block *)adapter;
 2266         *list = block->nmb_rlist;
 2267 
 2268         return (NDIS_STATUS_SUCCESS);
 2269 }
 2270 
 2271 static uint8_t
 2272 ndis_intr(iobj, arg)
 2273         kinterrupt              *iobj;
 2274         void                    *arg;
 2275 {
 2276         struct ndis_softc       *sc;
 2277         uint8_t                 is_our_intr = FALSE;
 2278         int                     call_isr = 0;
 2279         ndis_miniport_interrupt *intr;
 2280 
 2281         sc = arg;
 2282         intr = sc->ndis_block->nmb_interrupt;
 2283 
 2284         if (intr == NULL || sc->ndis_block->nmb_miniportadapterctx == NULL)
 2285                 return(FALSE);
 2286 
 2287         if (sc->ndis_block->nmb_interrupt->ni_isrreq == TRUE)
 2288                 MSCALL3(intr->ni_isrfunc, &is_our_intr, &call_isr,
 2289                     sc->ndis_block->nmb_miniportadapterctx);
 2290         else {
 2291                 MSCALL1(sc->ndis_chars->nmc_disable_interrupts_func,
 2292                     sc->ndis_block->nmb_miniportadapterctx);
 2293                 call_isr = 1;
 2294         }
 2295  
 2296         if (call_isr)
 2297                 IoRequestDpc(sc->ndis_block->nmb_deviceobj, NULL, sc);
 2298 
 2299         return(is_our_intr);
 2300 }
 2301 
 2302 static void
 2303 ndis_intrhand(dpc, intr, sysarg1, sysarg2)
 2304         kdpc                    *dpc;
 2305         ndis_miniport_interrupt *intr;
 2306         void                    *sysarg1;
 2307         void                    *sysarg2;
 2308 {
 2309         struct ndis_softc       *sc;
 2310         ndis_miniport_block     *block;
 2311         ndis_handle             adapter;
 2312 
 2313         block = intr->ni_block;
 2314         adapter = block->nmb_miniportadapterctx;
 2315         sc = device_get_softc(block->nmb_physdeviceobj->do_devext);
 2316 
 2317         if (NDIS_SERIALIZED(sc->ndis_block))
 2318                 KeAcquireSpinLockAtDpcLevel(&block->nmb_lock);
 2319 
 2320         MSCALL1(intr->ni_dpcfunc, adapter);
 2321 
 2322         /* If there's a MiniportEnableInterrupt() routine, call it. */
 2323 
 2324         if (sc->ndis_chars->nmc_enable_interrupts_func != NULL)
 2325                 MSCALL1(sc->ndis_chars->nmc_enable_interrupts_func, adapter);
 2326 
 2327         if (NDIS_SERIALIZED(sc->ndis_block))
 2328                 KeReleaseSpinLockFromDpcLevel(&block->nmb_lock);
 2329 
 2330         /*
 2331          * Set the completion event if we've drained all
 2332          * pending interrupts.
 2333          */
 2334 
 2335         KeAcquireSpinLockAtDpcLevel(&intr->ni_dpccountlock);
 2336         intr->ni_dpccnt--;
 2337         if (intr->ni_dpccnt == 0)
 2338                 KeSetEvent(&intr->ni_dpcevt, IO_NO_INCREMENT, FALSE);
 2339         KeReleaseSpinLockFromDpcLevel(&intr->ni_dpccountlock);
 2340 
 2341         return;
 2342 }
 2343 
 2344 static ndis_status
 2345 NdisMRegisterInterrupt(ndis_miniport_interrupt *intr, ndis_handle adapter,
 2346     uint32_t ivec, uint32_t ilevel, uint8_t reqisr, uint8_t shared,
 2347     ndis_interrupt_mode imode)
 2348 {
 2349         ndis_miniport_block     *block;
 2350         ndis_miniport_characteristics *ch;
 2351         struct ndis_softc       *sc;
 2352         int                     error;
 2353 
 2354         block = adapter;
 2355         sc = device_get_softc(block->nmb_physdeviceobj->do_devext);
 2356         ch = IoGetDriverObjectExtension(block->nmb_deviceobj->do_drvobj,
 2357             (void *)1);
 2358 
 2359         intr->ni_rsvd = ExAllocatePoolWithTag(NonPagedPool,
 2360             sizeof(struct mtx), 0);
 2361         if (intr->ni_rsvd == NULL)
 2362                 return(NDIS_STATUS_RESOURCES);
 2363 
 2364         intr->ni_block = adapter;
 2365         intr->ni_isrreq = reqisr;
 2366         intr->ni_shared = shared;
 2367         intr->ni_dpccnt = 0;
 2368         intr->ni_isrfunc = ch->nmc_isr_func;
 2369         intr->ni_dpcfunc = ch->nmc_interrupt_func;
 2370 
 2371         KeInitializeEvent(&intr->ni_dpcevt, EVENT_TYPE_NOTIFY, TRUE);
 2372         KeInitializeDpc(&intr->ni_dpc,
 2373             ndis_findwrap((funcptr)ndis_intrhand), intr);
 2374         KeSetImportanceDpc(&intr->ni_dpc, KDPC_IMPORTANCE_LOW);
 2375 
 2376         error = IoConnectInterrupt(&intr->ni_introbj,
 2377             ndis_findwrap((funcptr)ndis_intr), sc, NULL,
 2378             ivec, ilevel, 0, imode, shared, 0, FALSE);
 2379 
 2380         if (error != STATUS_SUCCESS)
 2381                 return(NDIS_STATUS_FAILURE);
 2382 
 2383         block->nmb_interrupt = intr;
 2384 
 2385         return(NDIS_STATUS_SUCCESS);
 2386 }
 2387 
 2388 static void
 2389 NdisMDeregisterInterrupt(intr)
 2390         ndis_miniport_interrupt *intr;
 2391 {
 2392         ndis_miniport_block     *block;
 2393         uint8_t                 irql;
 2394 
 2395         block = intr->ni_block;
 2396 
 2397         /* Should really be KeSynchronizeExecution() */
 2398 
 2399         KeAcquireSpinLock(intr->ni_introbj->ki_lock, &irql);
 2400         block->nmb_interrupt = NULL;
 2401         KeReleaseSpinLock(intr->ni_introbj->ki_lock, irql);
 2402 /*
 2403         KeFlushQueuedDpcs();
 2404 */
 2405         /* Disconnect our ISR */
 2406 
 2407         IoDisconnectInterrupt(intr->ni_introbj);
 2408 
 2409         KeWaitForSingleObject(&intr->ni_dpcevt, 0, 0, FALSE, NULL);
 2410         KeResetEvent(&intr->ni_dpcevt);
 2411 
 2412         return;
 2413 }
 2414 
 2415 static void
 2416 NdisMRegisterAdapterShutdownHandler(adapter, shutdownctx, shutdownfunc)
 2417         ndis_handle             adapter;
 2418         void                    *shutdownctx;
 2419         ndis_shutdown_handler   shutdownfunc;
 2420 {
 2421         ndis_miniport_block     *block;
 2422         ndis_miniport_characteristics *chars;
 2423         struct ndis_softc       *sc;
 2424 
 2425         if (adapter == NULL)
 2426                 return;
 2427 
 2428         block = (ndis_miniport_block *)adapter;
 2429         sc = device_get_softc(block->nmb_physdeviceobj->do_devext);
 2430         chars = sc->ndis_chars;
 2431 
 2432         chars->nmc_shutdown_handler = shutdownfunc;
 2433         chars->nmc_rsvd0 = shutdownctx;
 2434 
 2435         return;
 2436 }
 2437 
 2438 static void
 2439 NdisMDeregisterAdapterShutdownHandler(adapter)
 2440         ndis_handle             adapter;
 2441 {
 2442         ndis_miniport_block     *block;
 2443         ndis_miniport_characteristics *chars;
 2444         struct ndis_softc       *sc;
 2445 
 2446         if (adapter == NULL)
 2447                 return;
 2448 
 2449         block = (ndis_miniport_block *)adapter;
 2450         sc = device_get_softc(block->nmb_physdeviceobj->do_devext);
 2451         chars = sc->ndis_chars;
 2452 
 2453         chars->nmc_shutdown_handler = NULL;
 2454         chars->nmc_rsvd0 = NULL;
 2455 
 2456         return;
 2457 }
 2458 
 2459 static uint32_t
 2460 NDIS_BUFFER_TO_SPAN_PAGES(buf)
 2461         ndis_buffer             *buf;
 2462 {
 2463         if (buf == NULL)
 2464                 return(0);
 2465         if (MmGetMdlByteCount(buf) == 0)
 2466                 return(1);
 2467         return(SPAN_PAGES(MmGetMdlVirtualAddress(buf),
 2468             MmGetMdlByteCount(buf)));
 2469 }
 2470 
 2471 static void
 2472 NdisGetBufferPhysicalArraySize(buf, pages)
 2473         ndis_buffer             *buf;
 2474         uint32_t                *pages;
 2475 {
 2476         if (buf == NULL)
 2477                 return;
 2478 
 2479         *pages = NDIS_BUFFER_TO_SPAN_PAGES(buf);
 2480         return;
 2481 }
 2482 
 2483 static void
 2484 NdisQueryBufferOffset(buf, off, len)
 2485         ndis_buffer             *buf;
 2486         uint32_t                *off;
 2487         uint32_t                *len;
 2488 {
 2489         if (buf == NULL)
 2490                 return;
 2491 
 2492         *off = MmGetMdlByteOffset(buf);
 2493         *len = MmGetMdlByteCount(buf);
 2494 
 2495         return;
 2496 }
 2497 
 2498 void
 2499 NdisMSleep(usecs)
 2500         uint32_t                usecs;
 2501 {
 2502         ktimer                  timer;
 2503 
 2504         /*
 2505          * During system bootstrap, (i.e. cold == 1), we aren't
 2506          * allowed to sleep, so we have to do a hard DELAY()
 2507          * instead.
 2508          */
 2509 
 2510         if (cold)
 2511                 DELAY(usecs);
 2512         else {
 2513                 KeInitializeTimer(&timer);
 2514                 KeSetTimer(&timer, ((int64_t)usecs * -10), NULL);
 2515                 KeWaitForSingleObject(&timer, 0, 0, FALSE, NULL);
 2516         }
 2517 
 2518         return;
 2519 }
 2520 
 2521 static uint32_t
 2522 NdisReadPcmciaAttributeMemory(handle, offset, buf, len)
 2523         ndis_handle             handle;
 2524         uint32_t                offset;
 2525         void                    *buf;
 2526         uint32_t                len;
 2527 {
 2528         struct ndis_softc       *sc;
 2529         ndis_miniport_block     *block;
 2530         bus_space_handle_t      bh;
 2531         bus_space_tag_t         bt;
 2532         char                    *dest;
 2533         int                     i;
 2534 
 2535         if (handle == NULL)
 2536                 return(0);
 2537 
 2538         block = (ndis_miniport_block *)handle;
 2539         sc = device_get_softc(block->nmb_physdeviceobj->do_devext);
 2540         dest = buf;
 2541 
 2542         bh = rman_get_bushandle(sc->ndis_res_am);
 2543         bt = rman_get_bustag(sc->ndis_res_am);
 2544 
 2545         for (i = 0; i < len; i++)
 2546                 dest[i] = bus_space_read_1(bt, bh, (offset + i) * 2);
 2547 
 2548         return(i);
 2549 }
 2550 
 2551 static uint32_t
 2552 NdisWritePcmciaAttributeMemory(handle, offset, buf, len)
 2553         ndis_handle             handle;
 2554         uint32_t                offset;
 2555         void                    *buf;
 2556         uint32_t                len;
 2557 {
 2558         struct ndis_softc       *sc;
 2559         ndis_miniport_block     *block;
 2560         bus_space_handle_t      bh;
 2561         bus_space_tag_t         bt;
 2562         char                    *src;
 2563         int                     i;
 2564 
 2565         if (handle == NULL)
 2566                 return(0);
 2567 
 2568         block = (ndis_miniport_block *)handle;
 2569         sc = device_get_softc(block->nmb_physdeviceobj->do_devext);
 2570         src = buf;
 2571 
 2572         bh = rman_get_bushandle(sc->ndis_res_am);
 2573         bt = rman_get_bustag(sc->ndis_res_am);
 2574 
 2575         for (i = 0; i < len; i++)
 2576                 bus_space_write_1(bt, bh, (offset + i) * 2, src[i]);
 2577 
 2578         return(i);
 2579 }
 2580 
 2581 static list_entry *
 2582 NdisInterlockedInsertHeadList(head, entry, lock)
 2583         list_entry              *head;
 2584         list_entry              *entry;
 2585         ndis_spin_lock          *lock;
 2586 {
 2587         list_entry              *flink;
 2588 
 2589         KeAcquireSpinLock(&lock->nsl_spinlock, &lock->nsl_kirql);
 2590         flink = head->nle_flink;
 2591         entry->nle_flink = flink;
 2592         entry->nle_blink = head;
 2593         flink->nle_blink = entry;
 2594         head->nle_flink = entry;
 2595         KeReleaseSpinLock(&lock->nsl_spinlock, lock->nsl_kirql);
 2596 
 2597         return(flink);
 2598 }
 2599 
 2600 static list_entry *
 2601 NdisInterlockedRemoveHeadList(head, lock)
 2602         list_entry              *head;
 2603         ndis_spin_lock          *lock;
 2604 {
 2605         list_entry              *flink;
 2606         list_entry              *entry;
 2607 
 2608         KeAcquireSpinLock(&lock->nsl_spinlock, &lock->nsl_kirql);
 2609         entry = head->nle_flink;
 2610         flink = entry->nle_flink;
 2611         head->nle_flink = flink;
 2612         flink->nle_blink = head;
 2613         KeReleaseSpinLock(&lock->nsl_spinlock, lock->nsl_kirql);
 2614 
 2615         return(entry);
 2616 }
 2617 
 2618 static list_entry *
 2619 NdisInterlockedInsertTailList(head, entry, lock)
 2620         list_entry              *head;
 2621         list_entry              *entry;
 2622         ndis_spin_lock          *lock;
 2623 {
 2624         list_entry              *blink;
 2625 
 2626         KeAcquireSpinLock(&lock->nsl_spinlock, &lock->nsl_kirql);
 2627         blink = head->nle_blink;
 2628         entry->nle_flink = head;
 2629         entry->nle_blink = blink;
 2630         blink->nle_flink = entry;
 2631         head->nle_blink = entry;
 2632         KeReleaseSpinLock(&lock->nsl_spinlock, lock->nsl_kirql);
 2633 
 2634         return(blink);
 2635 }
 2636 
 2637 static uint8_t
 2638 NdisMSynchronizeWithInterrupt(intr, syncfunc, syncctx)
 2639         ndis_miniport_interrupt *intr;
 2640         void                    *syncfunc;
 2641         void                    *syncctx;
 2642 {
 2643         return(KeSynchronizeExecution(intr->ni_introbj, syncfunc, syncctx));
 2644 }
 2645 
 2646 static void
 2647 NdisGetCurrentSystemTime(tval)
 2648         uint64_t                *tval;
 2649 {
 2650         ntoskrnl_time(tval);
 2651         return;
 2652 }
 2653 
 2654 /*
 2655  * Return the number of milliseconds since the system booted.
 2656  */
 2657 static void
 2658 NdisGetSystemUpTime(tval)
 2659         uint32_t                *tval;
 2660 {
 2661         struct timespec         ts;
 2662 
 2663         nanouptime(&ts);
 2664         *tval = ts.tv_nsec / 1000000 + ts.tv_sec * 1000;
 2665 
 2666         return;
 2667 }
 2668 
 2669 static void
 2670 NdisInitializeString(dst, src)
 2671         unicode_string          *dst;
 2672         char                    *src;
 2673 {
 2674         ansi_string             as;
 2675         RtlInitAnsiString(&as, src);
 2676         RtlAnsiStringToUnicodeString(dst, &as, TRUE);
 2677         return;
 2678 }
 2679 
 2680 static void
 2681 NdisFreeString(str)
 2682         unicode_string          *str;
 2683 {
 2684         RtlFreeUnicodeString(str);
 2685         return;
 2686 }
 2687 
 2688 static ndis_status
 2689 NdisMRemoveMiniport(adapter)
 2690         ndis_handle             *adapter;
 2691 {
 2692         return(NDIS_STATUS_SUCCESS);
 2693 }
 2694 
 2695 static void
 2696 NdisInitAnsiString(dst, src)
 2697         ansi_string             *dst;
 2698         char                    *src;
 2699 {
 2700         RtlInitAnsiString(dst, src);
 2701         return;
 2702 }
 2703 
 2704 static void
 2705 NdisInitUnicodeString(dst, src)
 2706         unicode_string          *dst;
 2707         uint16_t                *src;
 2708 {
 2709         RtlInitUnicodeString(dst, src);
 2710         return;
 2711 }
 2712 
 2713 static void NdisMGetDeviceProperty(adapter, phydevobj,
 2714         funcdevobj, nextdevobj, resources, transresources)
 2715         ndis_handle             adapter;
 2716         device_object           **phydevobj;
 2717         device_object           **funcdevobj;
 2718         device_object           **nextdevobj;
 2719         cm_resource_list        *resources;
 2720         cm_resource_list        *transresources;
 2721 {
 2722         ndis_miniport_block     *block;
 2723 
 2724         block = (ndis_miniport_block *)adapter;
 2725 
 2726         if (phydevobj != NULL)
 2727                 *phydevobj = block->nmb_physdeviceobj;
 2728         if (funcdevobj != NULL)
 2729                 *funcdevobj = block->nmb_deviceobj;
 2730         if (nextdevobj != NULL)
 2731                 *nextdevobj = block->nmb_nextdeviceobj;
 2732 
 2733         return;
 2734 }
 2735 
 2736 static void
 2737 NdisGetFirstBufferFromPacket(packet, buf, firstva, firstlen, totlen)
 2738         ndis_packet             *packet;
 2739         ndis_buffer             **buf;
 2740         void                    **firstva;
 2741         uint32_t                *firstlen;
 2742         uint32_t                *totlen;
 2743 {
 2744         ndis_buffer             *tmp;
 2745 
 2746         tmp = packet->np_private.npp_head;
 2747         *buf = tmp;
 2748         if (tmp == NULL) {
 2749                 *firstva = NULL;
 2750                 *firstlen = *totlen = 0;
 2751         } else {
 2752                 *firstva = MmGetMdlVirtualAddress(tmp);
 2753                 *firstlen = *totlen = MmGetMdlByteCount(tmp);
 2754                 for (tmp = tmp->mdl_next; tmp != NULL; tmp = tmp->mdl_next)
 2755                         *totlen += MmGetMdlByteCount(tmp);
 2756         }
 2757 
 2758         return;
 2759 }
 2760 
 2761 static void
 2762 NdisGetFirstBufferFromPacketSafe(packet, buf, firstva, firstlen, totlen, prio)
 2763         ndis_packet             *packet;
 2764         ndis_buffer             **buf;
 2765         void                    **firstva;
 2766         uint32_t                *firstlen;
 2767         uint32_t                *totlen;
 2768         uint32_t                prio;
 2769 {
 2770         NdisGetFirstBufferFromPacket(packet, buf, firstva, firstlen, totlen);
 2771 }
 2772 
 2773 static int
 2774 ndis_find_sym(lf, filename, suffix, sym)
 2775         linker_file_t           lf;
 2776         char                    *filename;
 2777         char                    *suffix;
 2778         caddr_t                 *sym;
 2779 {
 2780         char                    *fullsym;
 2781         char                    *suf;
 2782         int                     i;
 2783 
 2784         fullsym = ExAllocatePoolWithTag(NonPagedPool, MAXPATHLEN, 0);
 2785         if (fullsym == NULL)
 2786                 return(ENOMEM);
 2787 
 2788         bzero(fullsym, MAXPATHLEN);
 2789         strncpy(fullsym, filename, MAXPATHLEN);
 2790         if (strlen(filename) < 4) {
 2791                 ExFreePool(fullsym);
 2792                 return(EINVAL);
 2793         }
 2794 
 2795         /* If the filename has a .ko suffix, strip if off. */
 2796         suf = fullsym + (strlen(filename) - 3);
 2797         if (strcmp(suf, ".ko") == 0)
 2798                 *suf = '\0';
 2799 
 2800         for (i = 0; i < strlen(fullsym); i++) {
 2801                 if (fullsym[i] == '.')
 2802                         fullsym[i] = '_';
 2803                 else
 2804                         fullsym[i] = tolower(fullsym[i]);
 2805         }
 2806         strcat(fullsym, suffix);
 2807         *sym = linker_file_lookup_symbol(lf, fullsym, 0);
 2808         ExFreePool(fullsym);
 2809         if (*sym == 0)
 2810                 return(ENOENT);
 2811 
 2812         return(0);
 2813 }
 2814 
 2815 struct ndis_checkmodule {
 2816         char    *afilename;
 2817         ndis_fh *fh;
 2818 };
 2819 
 2820 /*
 2821  * See if a single module contains the symbols for a specified file.
 2822  */
 2823 static int
 2824 NdisCheckModule(linker_file_t lf, void *context)
 2825 {
 2826         struct ndis_checkmodule *nc;
 2827         caddr_t                 kldstart, kldend;
 2828 
 2829         nc = (struct ndis_checkmodule *)context;
 2830         if (ndis_find_sym(lf, nc->afilename, "_start", &kldstart))
 2831                 return (0);
 2832         if (ndis_find_sym(lf, nc->afilename, "_end", &kldend))
 2833                 return (0);
 2834         nc->fh->nf_vp = lf;
 2835         nc->fh->nf_map = NULL;
 2836         nc->fh->nf_type = NDIS_FH_TYPE_MODULE;
 2837         nc->fh->nf_maplen = (kldend - kldstart) & 0xFFFFFFFF;
 2838         return (1);
 2839 }
 2840 
 2841 /* can also return NDIS_STATUS_RESOURCES/NDIS_STATUS_ERROR_READING_FILE */
 2842 static void
 2843 NdisOpenFile(status, filehandle, filelength, filename, highestaddr)
 2844         ndis_status             *status;
 2845         ndis_handle             *filehandle;
 2846         uint32_t                *filelength;
 2847         unicode_string          *filename;
 2848         ndis_physaddr           highestaddr;
 2849 {
 2850         ansi_string             as;
 2851         char                    *afilename = NULL;
 2852         struct thread           *td = curthread;
 2853         struct nameidata        nd;
 2854         int                     flags, error, vfslocked;
 2855         struct vattr            vat;
 2856         struct vattr            *vap = &vat;
 2857         ndis_fh                 *fh;
 2858         char                    *path;
 2859         struct ndis_checkmodule nc;
 2860 
 2861         if (RtlUnicodeStringToAnsiString(&as, filename, TRUE)) {
 2862                 *status = NDIS_STATUS_RESOURCES;
 2863                 return;
 2864         }
 2865 
 2866         afilename = strdup(as.as_buf, M_DEVBUF);
 2867         RtlFreeAnsiString(&as);
 2868 
 2869         fh = ExAllocatePoolWithTag(NonPagedPool, sizeof(ndis_fh), 0);
 2870         if (fh == NULL) {
 2871                 free(afilename, M_DEVBUF);
 2872                 *status = NDIS_STATUS_RESOURCES;
 2873                 return;
 2874         }
 2875 
 2876         fh->nf_name = afilename;
 2877 
 2878         /*
 2879          * During system bootstrap, it's impossible to load files
 2880          * from the rootfs since it's not mounted yet. We therefore
 2881          * offer the possibility of opening files that have been
 2882          * preloaded as modules instead. Both choices will work
 2883          * when kldloading a module from multiuser, but only the
 2884          * module option will work during bootstrap. The module
 2885          * loading option works by using the ndiscvt(8) utility
 2886          * to convert the arbitrary file into a .ko using objcopy(1).
 2887          * This file will contain two special symbols: filename_start
 2888          * and filename_end. All we have to do is traverse the KLD
 2889          * list in search of those symbols and we've found the file
 2890          * data. As an added bonus, ndiscvt(8) will also generate
 2891          * a normal .o file which can be linked statically with
 2892          * the kernel. This means that the symbols will actual reside
 2893          * in the kernel's symbol table, but that doesn't matter to
 2894          * us since the kernel appears to us as just another module.
 2895          */
 2896 
 2897         nc.afilename = afilename;
 2898         nc.fh = fh;
 2899         if (linker_file_foreach(NdisCheckModule, &nc)) {
 2900                 *filelength = fh->nf_maplen;
 2901                 *filehandle = fh;
 2902                 *status = NDIS_STATUS_SUCCESS;
 2903                 return;
 2904         }
 2905 
 2906         if (TAILQ_EMPTY(&mountlist)) {
 2907                 ExFreePool(fh);
 2908                 *status = NDIS_STATUS_FILE_NOT_FOUND;
 2909                 printf("NDIS: could not find file %s in linker list\n",
 2910                     afilename);
 2911                 printf("NDIS: and no filesystems mounted yet, "
 2912                     "aborting NdisOpenFile()\n");
 2913                 free(afilename, M_DEVBUF);
 2914                 return;
 2915         }
 2916 
 2917         path = ExAllocatePoolWithTag(NonPagedPool, MAXPATHLEN, 0);
 2918         if (path == NULL) {
 2919                 ExFreePool(fh);
 2920                 free(afilename, M_DEVBUF);
 2921                 *status = NDIS_STATUS_RESOURCES;
 2922                 return;
 2923         }
 2924 
 2925         snprintf(path, MAXPATHLEN, "%s/%s", ndis_filepath, afilename);
 2926 
 2927         /* Some threads don't have a current working directory. */
 2928 
 2929         if (td->td_proc->p_fd->fd_rdir == NULL)
 2930                 td->td_proc->p_fd->fd_rdir = rootvnode;
 2931         if (td->td_proc->p_fd->fd_cdir == NULL)
 2932                 td->td_proc->p_fd->fd_cdir = rootvnode;
 2933 
 2934         NDINIT(&nd, LOOKUP, FOLLOW | MPSAFE, UIO_SYSSPACE, path, td);
 2935 
 2936         flags = FREAD;
 2937         error = vn_open(&nd, &flags, 0, NULL);
 2938         if (error) {
 2939                 *status = NDIS_STATUS_FILE_NOT_FOUND;
 2940                 ExFreePool(fh);
 2941                 printf("NDIS: open file %s failed: %d\n", path, error);
 2942                 ExFreePool(path);
 2943                 free(afilename, M_DEVBUF);
 2944                 return;
 2945         }
 2946         vfslocked = NDHASGIANT(&nd);
 2947 
 2948         ExFreePool(path);
 2949 
 2950         NDFREE(&nd, NDF_ONLY_PNBUF);
 2951 
 2952         /* Get the file size. */
 2953         VOP_GETATTR(nd.ni_vp, vap, td->td_ucred);
 2954         VOP_UNLOCK(nd.ni_vp, 0);
 2955         VFS_UNLOCK_GIANT(vfslocked);
 2956 
 2957         fh->nf_vp = nd.ni_vp;
 2958         fh->nf_map = NULL;
 2959         fh->nf_type = NDIS_FH_TYPE_VFS;
 2960         *filehandle = fh;
 2961         *filelength = fh->nf_maplen = vap->va_size & 0xFFFFFFFF;
 2962         *status = NDIS_STATUS_SUCCESS;
 2963 
 2964         return;
 2965 }
 2966 
 2967 static void
 2968 NdisMapFile(status, mappedbuffer, filehandle)
 2969         ndis_status             *status;
 2970         void                    **mappedbuffer;
 2971         ndis_handle             filehandle;
 2972 {
 2973         ndis_fh                 *fh;
 2974         struct thread           *td = curthread;
 2975         linker_file_t           lf;
 2976         caddr_t                 kldstart;
 2977         int                     error, resid, vfslocked;
 2978         struct vnode            *vp;
 2979 
 2980         if (filehandle == NULL) {
 2981                 *status = NDIS_STATUS_FAILURE;
 2982                 return;
 2983         }
 2984 
 2985         fh = (ndis_fh *)filehandle;
 2986 
 2987         if (fh->nf_vp == NULL) {
 2988                 *status = NDIS_STATUS_FAILURE;
 2989                 return;
 2990         }
 2991 
 2992         if (fh->nf_map != NULL) {
 2993                 *status = NDIS_STATUS_ALREADY_MAPPED;
 2994                 return;
 2995         }
 2996 
 2997         if (fh->nf_type == NDIS_FH_TYPE_MODULE) {
 2998                 lf = fh->nf_vp;
 2999                 if (ndis_find_sym(lf, fh->nf_name, "_start", &kldstart)) {
 3000                         *status = NDIS_STATUS_FAILURE;
 3001                         return;
 3002                 }
 3003                 fh->nf_map = kldstart;
 3004                 *status = NDIS_STATUS_SUCCESS;
 3005                 *mappedbuffer = fh->nf_map;
 3006                 return;
 3007         }
 3008 
 3009         fh->nf_map = ExAllocatePoolWithTag(NonPagedPool, fh->nf_maplen, 0);
 3010 
 3011         if (fh->nf_map == NULL) {
 3012                 *status = NDIS_STATUS_RESOURCES;
 3013                 return;
 3014         }
 3015 
 3016         vp = fh->nf_vp;
 3017         vfslocked = VFS_LOCK_GIANT(vp->v_mount);
 3018         error = vn_rdwr(UIO_READ, vp, fh->nf_map, fh->nf_maplen, 0,
 3019             UIO_SYSSPACE, 0, td->td_ucred, NOCRED, &resid, td);
 3020         VFS_UNLOCK_GIANT(vfslocked);
 3021 
 3022         if (error)
 3023                 *status = NDIS_STATUS_FAILURE;
 3024         else {
 3025                 *status = NDIS_STATUS_SUCCESS;
 3026                 *mappedbuffer = fh->nf_map;
 3027         }
 3028 
 3029         return;
 3030 }
 3031 
 3032 static void
 3033 NdisUnmapFile(filehandle)
 3034         ndis_handle             filehandle;
 3035 {
 3036         ndis_fh                 *fh;
 3037         fh = (ndis_fh *)filehandle;
 3038 
 3039         if (fh->nf_map == NULL)
 3040                 return;
 3041 
 3042         if (fh->nf_type == NDIS_FH_TYPE_VFS)
 3043                 ExFreePool(fh->nf_map);
 3044         fh->nf_map = NULL;
 3045 
 3046         return;
 3047 }
 3048 
 3049 static void
 3050 NdisCloseFile(filehandle)
 3051         ndis_handle             filehandle;
 3052 {
 3053         struct thread           *td = curthread;
 3054         ndis_fh                 *fh;
 3055         int                     vfslocked;
 3056         struct vnode            *vp;
 3057 
 3058         if (filehandle == NULL)
 3059                 return;
 3060 
 3061         fh = (ndis_fh *)filehandle;
 3062         if (fh->nf_map != NULL) {
 3063                 if (fh->nf_type == NDIS_FH_TYPE_VFS)
 3064                         ExFreePool(fh->nf_map);
 3065                 fh->nf_map = NULL;
 3066         }
 3067 
 3068         if (fh->nf_vp == NULL)
 3069                 return;
 3070 
 3071         if (fh->nf_type == NDIS_FH_TYPE_VFS) {
 3072                 vp = fh->nf_vp;
 3073                 vfslocked = VFS_LOCK_GIANT(vp->v_mount);
 3074                 vn_close(vp, FREAD, td->td_ucred, td);
 3075                 VFS_UNLOCK_GIANT(vfslocked);
 3076         }
 3077 
 3078         fh->nf_vp = NULL;
 3079         free(fh->nf_name, M_DEVBUF);
 3080         ExFreePool(fh);
 3081 
 3082         return;
 3083 }
 3084 
 3085 static uint8_t
 3086 NdisSystemProcessorCount()
 3087 {
 3088         return(mp_ncpus);
 3089 }
 3090 
 3091 typedef void (*ndis_statusdone_handler)(ndis_handle);
 3092 typedef void (*ndis_status_handler)(ndis_handle, ndis_status,
 3093     void *, uint32_t);
 3094 
 3095 static void
 3096 NdisMIndicateStatusComplete(adapter)
 3097         ndis_handle             adapter;
 3098 {
 3099         ndis_miniport_block     *block;
 3100         ndis_statusdone_handler statusdonefunc;
 3101 
 3102         block = (ndis_miniport_block *)adapter;
 3103         statusdonefunc = block->nmb_statusdone_func;
 3104 
 3105         MSCALL1(statusdonefunc, adapter);
 3106         return;
 3107 }
 3108 
 3109 static void
 3110 NdisMIndicateStatus(adapter, status, sbuf, slen)
 3111         ndis_handle             adapter;
 3112         ndis_status             status;
 3113         void                    *sbuf;
 3114         uint32_t                slen;
 3115 {
 3116         ndis_miniport_block     *block;
 3117         ndis_status_handler     statusfunc;
 3118 
 3119         block = (ndis_miniport_block *)adapter;
 3120         statusfunc = block->nmb_status_func;
 3121 
 3122         MSCALL4(statusfunc, adapter, status, sbuf, slen);
 3123         return;
 3124 }
 3125 
 3126 /*
 3127  * The DDK documentation says that you should use IoQueueWorkItem()
 3128  * instead of ExQueueWorkItem(). The problem is, IoQueueWorkItem()
 3129  * is fundamentally incompatible with NdisScheduleWorkItem(), which
 3130  * depends on the API semantics of ExQueueWorkItem(). In our world,
 3131  * ExQueueWorkItem() is implemented on top of IoAllocateQueueItem()
 3132  * anyway.
 3133  *
 3134  * There are actually three distinct APIs here. NdisScheduleWorkItem()
 3135  * takes a pointer to an NDIS_WORK_ITEM. ExQueueWorkItem() takes a pointer
 3136  * to a WORK_QUEUE_ITEM. And finally, IoQueueWorkItem() takes a pointer
 3137  * to an opaque work item thingie which you get from IoAllocateWorkItem().
 3138  * An NDIS_WORK_ITEM is not the same as a WORK_QUEUE_ITEM. However,
 3139  * the NDIS_WORK_ITEM has some opaque storage at the end of it, and we
 3140  * (ab)use this storage as a WORK_QUEUE_ITEM, which is what we submit
 3141  * to ExQueueWorkItem().
 3142  *
 3143  * Got all that? (Sheesh.)
 3144  */
 3145 
 3146 ndis_status
 3147 NdisScheduleWorkItem(work)
 3148         ndis_work_item          *work;
 3149 {
 3150         work_queue_item         *wqi;
 3151 
 3152         wqi = (work_queue_item *)work->nwi_wraprsvd;
 3153         ExInitializeWorkItem(wqi,
 3154             (work_item_func)work->nwi_func, work->nwi_ctx);
 3155         ExQueueWorkItem(wqi, WORKQUEUE_DELAYED);
 3156 
 3157         return(NDIS_STATUS_SUCCESS);
 3158 }
 3159 
 3160 static void
 3161 NdisCopyFromPacketToPacket(dpkt, doff, reqlen, spkt, soff, cpylen)
 3162         ndis_packet             *dpkt;
 3163         uint32_t                doff;
 3164         uint32_t                reqlen;
 3165         ndis_packet             *spkt;
 3166         uint32_t                soff;
 3167         uint32_t                *cpylen;
 3168 {
 3169         ndis_buffer             *src, *dst;
 3170         char                    *sptr, *dptr;
 3171         int                     resid, copied, len, scnt, dcnt;
 3172 
 3173         *cpylen = 0;
 3174 
 3175         src = spkt->np_private.npp_head;
 3176         dst = dpkt->np_private.npp_head;
 3177 
 3178         sptr = MmGetMdlVirtualAddress(src);
 3179         dptr = MmGetMdlVirtualAddress(dst);
 3180         scnt = MmGetMdlByteCount(src);
 3181         dcnt = MmGetMdlByteCount(dst);
 3182 
 3183         while (soff) {
 3184                 if (MmGetMdlByteCount(src) > soff) {
 3185                         sptr += soff;
 3186                         scnt = MmGetMdlByteCount(src)- soff;
 3187                         break;
 3188                 }
 3189                 soff -= MmGetMdlByteCount(src);
 3190                 src = src->mdl_next;
 3191                 if (src == NULL)
 3192                         return;
 3193                 sptr = MmGetMdlVirtualAddress(src);
 3194         }
 3195 
 3196         while (doff) {
 3197                 if (MmGetMdlByteCount(dst) > doff) {
 3198                         dptr += doff;
 3199                         dcnt = MmGetMdlByteCount(dst) - doff;
 3200                         break;
 3201                 }
 3202                 doff -= MmGetMdlByteCount(dst);
 3203                 dst = dst->mdl_next;
 3204                 if (dst == NULL)
 3205                         return;
 3206                 dptr = MmGetMdlVirtualAddress(dst);
 3207         }
 3208 
 3209         resid = reqlen;
 3210         copied = 0;
 3211 
 3212         while(1) {
 3213                 if (resid < scnt)
 3214                         len = resid;
 3215                 else
 3216                         len = scnt;
 3217                 if (dcnt < len)
 3218                         len = dcnt;
 3219 
 3220                 bcopy(sptr, dptr, len);
 3221 
 3222                 copied += len;
 3223                 resid -= len;
 3224                 if (resid == 0)
 3225                         break;
 3226 
 3227                 dcnt -= len;
 3228                 if (dcnt == 0) {
 3229                         dst = dst->mdl_next;
 3230                         if (dst == NULL)
 3231                                 break;
 3232                         dptr = MmGetMdlVirtualAddress(dst);
 3233                         dcnt = MmGetMdlByteCount(dst);
 3234                 }
 3235 
 3236                 scnt -= len;
 3237                 if (scnt == 0) {
 3238                         src = src->mdl_next;
 3239                         if (src == NULL)
 3240                                 break;
 3241                         sptr = MmGetMdlVirtualAddress(src);
 3242                         scnt = MmGetMdlByteCount(src);
 3243                 }
 3244         }
 3245 
 3246         *cpylen = copied;
 3247         return;
 3248 }
 3249 
 3250 static void
 3251 NdisCopyFromPacketToPacketSafe(dpkt, doff, reqlen, spkt, soff, cpylen, prio)
 3252         ndis_packet             *dpkt;
 3253         uint32_t                doff;
 3254         uint32_t                reqlen;
 3255         ndis_packet             *spkt;
 3256         uint32_t                soff;
 3257         uint32_t                *cpylen;
 3258         uint32_t                prio;
 3259 {
 3260         NdisCopyFromPacketToPacket(dpkt, doff, reqlen, spkt, soff, cpylen);
 3261         return;
 3262 }
 3263 
 3264 static void
 3265 NdisIMCopySendPerPacketInfo(dpkt, spkt)
 3266         ndis_packet             *dpkt;
 3267         ndis_packet             *spkt;
 3268 {
 3269         memcpy(&dpkt->np_ext, &spkt->np_ext, sizeof(ndis_packet_extension));
 3270 }
 3271 
 3272 static ndis_status
 3273 NdisMRegisterDevice(handle, devname, symname, majorfuncs, devobj, devhandle)
 3274         ndis_handle             handle;
 3275         unicode_string          *devname;
 3276         unicode_string          *symname;
 3277         driver_dispatch         *majorfuncs[];
 3278         void                    **devobj;
 3279         ndis_handle             *devhandle;
 3280 {
 3281         uint32_t                status;
 3282         device_object           *dobj;
 3283 
 3284         status = IoCreateDevice(handle, 0, devname,
 3285             FILE_DEVICE_UNKNOWN, 0, FALSE, &dobj);
 3286 
 3287         if (status == STATUS_SUCCESS) {
 3288                 *devobj = dobj;
 3289                 *devhandle = dobj;
 3290         }
 3291 
 3292         return(status);
 3293 }
 3294 
 3295 static ndis_status
 3296 NdisMDeregisterDevice(handle)
 3297         ndis_handle             handle;
 3298 {
 3299         IoDeleteDevice(handle);
 3300         return(NDIS_STATUS_SUCCESS);
 3301 }
 3302 
 3303 static ndis_status
 3304 NdisMQueryAdapterInstanceName(name, handle)
 3305         unicode_string          *name;
 3306         ndis_handle             handle;
 3307 {
 3308         ndis_miniport_block     *block;
 3309         device_t                dev;
 3310         ansi_string             as;
 3311 
 3312         block = (ndis_miniport_block *)handle;
 3313         dev = block->nmb_physdeviceobj->do_devext;
 3314 
 3315         RtlInitAnsiString(&as, __DECONST(char *, device_get_nameunit(dev)));
 3316         if (RtlAnsiStringToUnicodeString(name, &as, TRUE))
 3317                 return(NDIS_STATUS_RESOURCES);
 3318 
 3319         return(NDIS_STATUS_SUCCESS);
 3320 }
 3321 
 3322 static void
 3323 NdisMRegisterUnloadHandler(handle, func)
 3324         ndis_handle             handle;
 3325         void                    *func;
 3326 {
 3327         return;
 3328 }
 3329 
 3330 static void
 3331 dummy()
 3332 {
 3333         printf ("NDIS dummy called...\n");
 3334         return;
 3335 }
 3336 
 3337 /*
 3338  * Note: a couple of entries in this table specify the
 3339  * number of arguments as "foo + 1". These are routines
 3340  * that accept a 64-bit argument, passed by value. On
 3341  * x86, these arguments consume two longwords on the stack,
 3342  * so we lie and say there's one additional argument so
 3343  * that the wrapping routines will do the right thing.
 3344  */
 3345 
 3346 image_patch_table ndis_functbl[] = {
 3347         IMPORT_SFUNC(NdisCopyFromPacketToPacket, 6),
 3348         IMPORT_SFUNC(NdisCopyFromPacketToPacketSafe, 7),
 3349         IMPORT_SFUNC(NdisIMCopySendPerPacketInfo, 2),
 3350         IMPORT_SFUNC(NdisScheduleWorkItem, 1),
 3351         IMPORT_SFUNC(NdisMIndicateStatusComplete, 1),
 3352         IMPORT_SFUNC(NdisMIndicateStatus, 4),
 3353         IMPORT_SFUNC(NdisSystemProcessorCount, 0),
 3354         IMPORT_SFUNC(NdisUnchainBufferAtBack, 2),
 3355         IMPORT_SFUNC(NdisGetFirstBufferFromPacket, 5),
 3356         IMPORT_SFUNC(NdisGetFirstBufferFromPacketSafe, 6),
 3357         IMPORT_SFUNC(NdisGetBufferPhysicalArraySize, 2),
 3358         IMPORT_SFUNC(NdisMGetDeviceProperty, 6),
 3359         IMPORT_SFUNC(NdisInitAnsiString, 2),
 3360         IMPORT_SFUNC(NdisInitUnicodeString, 2),
 3361         IMPORT_SFUNC(NdisWriteConfiguration, 4),
 3362         IMPORT_SFUNC(NdisAnsiStringToUnicodeString, 2),
 3363         IMPORT_SFUNC(NdisTerminateWrapper, 2),
 3364         IMPORT_SFUNC(NdisOpenConfigurationKeyByName, 4),
 3365         IMPORT_SFUNC(NdisOpenConfigurationKeyByIndex, 5),
 3366         IMPORT_SFUNC(NdisMRemoveMiniport, 1),
 3367         IMPORT_SFUNC(NdisInitializeString, 2),
 3368         IMPORT_SFUNC(NdisFreeString, 1),
 3369         IMPORT_SFUNC(NdisGetCurrentSystemTime, 1),
 3370         IMPORT_SFUNC(NdisGetSystemUpTime, 1),
 3371         IMPORT_SFUNC(NdisMSynchronizeWithInterrupt, 3),
 3372         IMPORT_SFUNC(NdisMAllocateSharedMemoryAsync, 4),
 3373         IMPORT_SFUNC(NdisInterlockedInsertHeadList, 3),
 3374         IMPORT_SFUNC(NdisInterlockedInsertTailList, 3),
 3375         IMPORT_SFUNC(NdisInterlockedRemoveHeadList, 2),
 3376         IMPORT_SFUNC(NdisInitializeWrapper, 4),
 3377         IMPORT_SFUNC(NdisMRegisterMiniport, 3),
 3378         IMPORT_SFUNC(NdisAllocateMemoryWithTag, 3),
 3379         IMPORT_SFUNC(NdisAllocateMemory, 4 + 1),
 3380         IMPORT_SFUNC(NdisMSetAttributesEx, 5),
 3381         IMPORT_SFUNC(NdisCloseConfiguration, 1),
 3382         IMPORT_SFUNC(NdisReadConfiguration, 5),
 3383         IMPORT_SFUNC(NdisOpenConfiguration, 3),
 3384         IMPORT_SFUNC(NdisAcquireSpinLock, 1),
 3385         IMPORT_SFUNC(NdisReleaseSpinLock, 1),
 3386         IMPORT_SFUNC(NdisDprAcquireSpinLock, 1),
 3387         IMPORT_SFUNC(NdisDprReleaseSpinLock, 1),
 3388         IMPORT_SFUNC(NdisAllocateSpinLock, 1),
 3389         IMPORT_SFUNC(NdisInitializeReadWriteLock, 1),
 3390         IMPORT_SFUNC(NdisAcquireReadWriteLock, 3),
 3391         IMPORT_SFUNC(NdisReleaseReadWriteLock, 2),
 3392         IMPORT_SFUNC(NdisFreeSpinLock, 1),
 3393         IMPORT_SFUNC(NdisFreeMemory, 3),
 3394         IMPORT_SFUNC(NdisReadPciSlotInformation, 5),
 3395         IMPORT_SFUNC(NdisWritePciSlotInformation, 5),
 3396         IMPORT_SFUNC_MAP(NdisImmediateReadPciSlotInformation,
 3397             NdisReadPciSlotInformation, 5),
 3398         IMPORT_SFUNC_MAP(NdisImmediateWritePciSlotInformation,
 3399             NdisWritePciSlotInformation, 5),
 3400         IMPORT_CFUNC(NdisWriteErrorLogEntry, 0),
 3401         IMPORT_SFUNC(NdisMStartBufferPhysicalMapping, 6),
 3402         IMPORT_SFUNC(NdisMCompleteBufferPhysicalMapping, 3),
 3403         IMPORT_SFUNC(NdisMInitializeTimer, 4),
 3404         IMPORT_SFUNC(NdisInitializeTimer, 3),
 3405         IMPORT_SFUNC(NdisSetTimer, 2),
 3406         IMPORT_SFUNC(NdisMCancelTimer, 2),
 3407         IMPORT_SFUNC_MAP(NdisCancelTimer, NdisMCancelTimer, 2),
 3408         IMPORT_SFUNC(NdisMSetPeriodicTimer, 2),
 3409         IMPORT_SFUNC(NdisMQueryAdapterResources, 4),
 3410         IMPORT_SFUNC(NdisMRegisterIoPortRange, 4),
 3411         IMPORT_SFUNC(NdisMDeregisterIoPortRange, 4),
 3412         IMPORT_SFUNC(NdisReadNetworkAddress, 4),
 3413         IMPORT_SFUNC(NdisQueryMapRegisterCount, 2),
 3414         IMPORT_SFUNC(NdisMAllocateMapRegisters, 5),
 3415         IMPORT_SFUNC(NdisMFreeMapRegisters, 1),
 3416         IMPORT_SFUNC(NdisMAllocateSharedMemory, 5),
 3417         IMPORT_SFUNC(NdisMMapIoSpace, 4 + 1),
 3418         IMPORT_SFUNC(NdisMUnmapIoSpace, 3),
 3419         IMPORT_SFUNC(NdisGetCacheFillSize, 0),
 3420         IMPORT_SFUNC(NdisMGetDmaAlignment, 1),
 3421         IMPORT_SFUNC(NdisMInitializeScatterGatherDma, 3),
 3422         IMPORT_SFUNC(NdisAllocatePacketPool, 4),
 3423         IMPORT_SFUNC(NdisAllocatePacketPoolEx, 5),
 3424         IMPORT_SFUNC(NdisAllocatePacket, 3),
 3425         IMPORT_SFUNC(NdisFreePacket, 1),
 3426         IMPORT_SFUNC(NdisFreePacketPool, 1),
 3427         IMPORT_SFUNC_MAP(NdisDprAllocatePacket, NdisAllocatePacket, 3),
 3428         IMPORT_SFUNC_MAP(NdisDprFreePacket, NdisFreePacket, 1),
 3429         IMPORT_SFUNC(NdisAllocateBufferPool, 3),
 3430         IMPORT_SFUNC(NdisAllocateBuffer, 5),
 3431         IMPORT_SFUNC(NdisQueryBuffer, 3),
 3432         IMPORT_SFUNC(NdisQueryBufferSafe, 4),
 3433         IMPORT_SFUNC(NdisBufferVirtualAddress, 1),
 3434         IMPORT_SFUNC(NdisBufferVirtualAddressSafe, 2),
 3435         IMPORT_SFUNC(NdisBufferLength, 1),
 3436         IMPORT_SFUNC(NdisFreeBuffer, 1),
 3437         IMPORT_SFUNC(NdisFreeBufferPool, 1),
 3438         IMPORT_SFUNC(NdisInterlockedIncrement, 1),
 3439         IMPORT_SFUNC(NdisInterlockedDecrement, 1),
 3440         IMPORT_SFUNC(NdisInitializeEvent, 1),
 3441         IMPORT_SFUNC(NdisSetEvent, 1),
 3442         IMPORT_SFUNC(NdisResetEvent, 1),
 3443         IMPORT_SFUNC(NdisWaitEvent, 2),
 3444         IMPORT_SFUNC(NdisUnicodeStringToAnsiString, 2),
 3445         IMPORT_SFUNC(NdisMPciAssignResources, 3),
 3446         IMPORT_SFUNC(NdisMFreeSharedMemory, 5 + 1),
 3447         IMPORT_SFUNC(NdisMRegisterInterrupt, 7),
 3448         IMPORT_SFUNC(NdisMDeregisterInterrupt, 1),
 3449         IMPORT_SFUNC(NdisMRegisterAdapterShutdownHandler, 3),
 3450         IMPORT_SFUNC(NdisMDeregisterAdapterShutdownHandler, 1),
 3451         IMPORT_SFUNC(NDIS_BUFFER_TO_SPAN_PAGES, 1),
 3452         IMPORT_SFUNC(NdisQueryBufferOffset, 3),
 3453         IMPORT_SFUNC(NdisAdjustBufferLength, 2),
 3454         IMPORT_SFUNC(NdisPacketPoolUsage, 1),
 3455         IMPORT_SFUNC(NdisMSleep, 1),
 3456         IMPORT_SFUNC(NdisUnchainBufferAtFront, 2),
 3457         IMPORT_SFUNC(NdisReadPcmciaAttributeMemory, 4),
 3458         IMPORT_SFUNC(NdisWritePcmciaAttributeMemory, 4),
 3459         IMPORT_SFUNC(NdisOpenFile, 5 + 1),
 3460         IMPORT_SFUNC(NdisMapFile, 3),
 3461         IMPORT_SFUNC(NdisUnmapFile, 1),
 3462         IMPORT_SFUNC(NdisCloseFile, 1),
 3463         IMPORT_SFUNC(NdisMRegisterDevice, 6),
 3464         IMPORT_SFUNC(NdisMDeregisterDevice, 1),
 3465         IMPORT_SFUNC(NdisMQueryAdapterInstanceName, 2),
 3466         IMPORT_SFUNC(NdisMRegisterUnloadHandler, 2),
 3467         IMPORT_SFUNC(ndis_timercall, 4),
 3468         IMPORT_SFUNC(ndis_asyncmem_complete, 2),
 3469         IMPORT_SFUNC(ndis_intr, 2),
 3470         IMPORT_SFUNC(ndis_intrhand, 4),
 3471 
 3472         /*
 3473          * This last entry is a catch-all for any function we haven't
 3474          * implemented yet. The PE import list patching routine will
 3475          * use it for any function that doesn't have an explicit match
 3476          * in this table.
 3477          */
 3478 
 3479         { NULL, (FUNC)dummy, NULL, 0, WINDRV_WRAP_STDCALL },
 3480 
 3481         /* End of list. */
 3482 
 3483         { NULL, NULL, NULL }
 3484 };

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